1555650001 has 8 divisors (see below), whose sum is σ = 1597505184. Its totient is φ = 1514052960.

The previous prime is 1555649989. The next prime is 1555650017. The reversal of 1555650001 is 1000565551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1555650001 - 2⁹ = 1555649489 is a prime.

It is a super-2 number, since 2×1555650001² = 4840093851222600002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1555656001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52291 + ... + 76456.

It is an arithmetic number, because the mean of its divisors is an integer number (199688148).

Almost surely, 2^1555650001 is an apocalyptic number.

It is an amenable number.

1555650001 is a deficient number, since it is larger than the sum of its proper divisors (41855183).

1555650001 is a wasteful number, since it uses less digits than its factorization.

1555650001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129071.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 1555650001 is about 39441.7291836958. The cubic root of 1555650001 is about 1158.6989974553.

The spelling of 1555650001 in words is "one billion, five hundred fifty-five million, six hundred fifty thousand, one".