256118849780 has 24 divisors (see below), whose sum is σ = 555199572480. Its totient is φ = 99142780320.

The previous prime is 256118849741. The next prime is 256118849783. The reversal of 256118849780 is 87948811652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256118849783) 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, 206546840 + ... + 206548079.

It is an arithmetic number, because the mean of its divisors is an integer number (23133315520).

Almost surely, 2^256118849780 is an apocalyptic number.

256118849780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256118849780 is an abundant number, since it is smaller than the sum of its proper divisors (299080722700).

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

256118849780 is a wasteful number, since it uses less digits than its factorization.

256118849780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413094959 (or 413094957 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 59.

The spelling of 256118849780 in words is "two hundred fifty-six billion, one hundred eighteen million, eight hundred forty-nine thousand, seven hundred eighty".