161257674256 has 40 divisors (see below), whose sum is σ = 364357731200. Its totient is φ = 69110429472.

The previous prime is 161257674241. The next prime is 161257674329. The reversal of 161257674256 is 652476752161.

It is an unprimeable number.

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, 14686356 + ... + 14697331.

It is an arithmetic number, because the mean of its divisors is an integer number (9108943280).

Almost surely, 2^161257674256 is an apocalyptic number.

161257674256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161257674256 is an abundant number, since it is smaller than the sum of its proper divisors (203100056944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161257674256 is an equidigital number, since it uses as much as digits as its factorization.

161257674256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29383716 (or 29383696 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 52.

The spelling of 161257674256 in words is "one hundred sixty-one billion, two hundred fifty-seven million, six hundred seventy-four thousand, two hundred fifty-six".