256297492372 has 24 divisors (see below), whose sum is σ = 449348207616. Its totient is φ = 127912375968.

The previous prime is 256297492351. The next prime is 256297492393. The reversal of 256297492372 is 273294792652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (256297492351) and next prime (256297492393).

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, 21100533 + ... + 21112675.

It is an arithmetic number, because the mean of its divisors is an integer number (18722841984).

Almost surely, 2^256297492372 is an apocalyptic number.

It is an amenable number.

256297492372 is a deficient number, since it is larger than the sum of its proper divisors (193050715244).

256297492372 is a wasteful number, since it uses less digits than its factorization.

256297492372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21447 (or 21445 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 58.

The spelling of 256297492372 in words is "two hundred fifty-six billion, two hundred ninety-seven million, four hundred ninety-two thousand, three hundred seventy-two".