16245991256 has 32 divisors (see below), whose sum is σ = 33793675200. Its totient is φ = 7259377440.

The previous prime is 16245991243. The next prime is 16245991271. The reversal of 16245991256 is 65219954261.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1559330 + ... + 1569713.

It is an arithmetic number, because the mean of its divisors is an integer number (1056052350).

Almost surely, 2^16245991256 is an apocalyptic number.

It is an amenable number.

16245991256 is an abundant number, since it is smaller than the sum of its proper divisors (17547683944).

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

16245991256 is a wasteful number, since it uses less digits than its factorization.

16245991256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129119 (or 3129115 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 50.

The spelling of 16245991256 in words is "sixteen billion, two hundred forty-five million, nine hundred ninety-one thousand, two hundred fifty-six".