161513352256 has 28 divisors (see below), whose sum is σ = 320721126400. Its totient is φ = 80701729920.

The previous prime is 161513352127. The next prime is 161513352311. The reversal of 161513352256 is 652253315161.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763656 + ... + 951943.

Almost surely, 2^161513352256 is an apocalyptic number.

161513352256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161513352256 is a deficient number, since it is larger than the sum of its proper divisors (159207774144).

161513352256 is a wasteful number, since it uses less digits than its factorization.

161513352256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717082 (or 1717072 counting only the distinct ones).

The product of its digits is 162000, while the sum is 40.

The spelling of 161513352256 in words is "one hundred sixty-one billion, five hundred thirteen million, three hundred fifty-two thousand, two hundred fifty-six".