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70636145 = 537381817
BaseRepresentation
bin1000011010111…
…01001001110001
311220220200120112
410031131021301
5121040324040
611001551105
71515253166
oct415351161
9156820515
1070636145
1136965a88
121b7a5495
1311832248
14954a06d
156304365
hex435d271

70636145 has 8 divisors (see below), whose sum is σ = 87054504. Its totient is φ = 54981504.

The previous prime is 70636133. The next prime is 70636177. The reversal of 70636145 is 54163607.

It can be written as a sum of positive squares in 4 ways, for example, as 10975969 + 59660176 = 3313^2 + 7724^2 .

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 70636145 - 212 = 70632049 is a prime.

It is a super-2 number, since 2×706361452 = 9978929960922050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190724 + ... + 191093.

It is an arithmetic number, because the mean of its divisors is an integer number (10881813).

Almost surely, 270636145 is an apocalyptic number.

It is an amenable number.

70636145 is a deficient number, since it is larger than the sum of its proper divisors (16418359).

70636145 is a wasteful number, since it uses less digits than its factorization.

70636145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381859.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 70636145 is about 8404.5312183369. The cubic root of 70636145 is about 413.3732123478.

The spelling of 70636145 in words is "seventy million, six hundred thirty-six thousand, one hundred forty-five".

Divisors: 1 5 37 185 381817 1909085 14127229 70636145