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557795161 = 711531031327
BaseRepresentation
bin100001001111110…
…100011101011001
31102212120221010001
4201033310131121
52120243421121
6131203253001
716552115650
oct4117643531
91385527101
10557795161
11266951840
1213697a161
138b73c611
145411c197
1533e82991
hex213f4759

557795161 has 32 divisors (see below), whose sum is σ = 715972608. Its totient is φ = 421986240.

The previous prime is 557795153. The next prime is 557795171. The reversal of 557795161 is 161597755.

557795161 = 71162 + 71172 + ... + 71262.

It is a 2-Lehmer number, since φ(557795161) divides (557795161-1)2.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 557795161 - 23 = 557795153 is a prime.

It is a super-2 number, since 2×5577951612 = 622270883270031842, which contains 22 as substring.

It is a deceptive number, since it divides R557795160.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557795101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 419680 + ... + 421006.

It is an arithmetic number, because the mean of its divisors is an integer number (22374144).

It is a Poulet number, since it divides 2557795160-1.

Almost surely, 2557795161 is an apocalyptic number.

It is an amenable number.

557795161 is a deficient number, since it is larger than the sum of its proper divisors (158177447).

557795161 is a wasteful number, since it uses less digits than its factorization.

557795161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501.

The product of its digits is 330750, while the sum is 46.

The square root of 557795161 is about 23617.6874608841. The cubic root of 557795161 is about 823.1738787440.

The spelling of 557795161 in words is "five hundred fifty-seven million, seven hundred ninety-five thousand, one hundred sixty-one".

Divisors: 1 7 11 53 77 103 371 583 721 1133 1327 4081 5459 7931 9289 14597 38213 60049 70331 102179 136681 420343 492317 773641 956767 1503491 5415487 7244093 10524437 50708651 79685023 557795161