161236007256 has 32 divisors (see below), whose sum is σ = 403128635760. Its totient is φ = 53740186752.

The previous prime is 161236007237. The next prime is 161236007269. The reversal of 161236007256 is 652700632161.

It is a congruent number.

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, 61795 + ... + 571218.

Almost surely, 2^161236007256 is an apocalyptic number.

It is an amenable number.

161236007256 is an abundant number, since it is smaller than the sum of its proper divisors (241892628504).

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

161236007256 is a wasteful number, since it uses less digits than its factorization.

161236007256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643635 (or 643631 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 161236007256 in words is "one hundred sixty-one billion, two hundred thirty-six million, seven thousand, two hundred fifty-six".