256735493937188 has 48 divisors (see below), whose sum is σ = 513970266566400. Its totient is φ = 109922516726400.

The previous prime is 256735493937149. The next prime is 256735493937253. The reversal of 256735493937188 is 881739394537652.

It is a super-2 number, since 2×256735493937188² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 896589638 + ... + 896875938.

It is an arithmetic number, because the mean of its divisors is an integer number (10707713886800).

Almost surely, 2^{256735493937188} is an apocalyptic number.

256735493937188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

256735493937188 is an abundant number, since it is smaller than the sum of its proper divisors (257234772629212).

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

256735493937188 is a wasteful number, since it uses less digits than its factorization.

256735493937188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317340 (or 317338 counting only the distinct ones).

The product of its digits is 8230118400, while the sum is 80.

The spelling of 256735493937188 in words is "two hundred fifty-six trillion, seven hundred thirty-five billion, four hundred ninety-three million, nine hundred thirty-seven thousand, one hundred eighty-eight".