256782500548 has 24 divisors (see below), whose sum is σ = 522269496000. Its totient is φ = 108184394208.

The previous prime is 256782500543. The next prime is 256782500587. The reversal of 256782500548 is 845005287652.

It is a junction number, because it is equal to n+sod(n) for n = 256782500495 and 256782500504.

It is not an unprimeable number, because it can be changed into a prime (256782500543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77717023 + ... + 77720326.

It is an arithmetic number, because the mean of its divisors is an integer number (21761229000).

Almost surely, 2^256782500548 is an apocalyptic number.

256782500548 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

256782500548 is an abundant number, since it is smaller than the sum of its proper divisors (265486995452).

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

256782500548 is a wasteful number, since it uses less digits than its factorization.

256782500548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155437419 (or 155437417 counting only the distinct ones).

The product of its (nonzero) digits is 5376000, while the sum is 52.

The spelling of 256782500548 in words is "two hundred fifty-six billion, seven hundred eighty-two million, five hundred thousand, five hundred forty-eight".