256441677340 has 48 divisors (see below), whose sum is σ = 557222107680. Its totient is φ = 99017381120.

The previous prime is 256441677319. The next prime is 256441677379. The reversal of 256441677340 is 43776144652.

It is a congruent number.

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, 2673654 + ... + 2767906.

It is an arithmetic number, because the mean of its divisors is an integer number (11608793910).

Almost surely, 2^256441677340 is an apocalyptic number.

256441677340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256441677340 is an abundant number, since it is smaller than the sum of its proper divisors (300780430340).

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

256441677340 is a wasteful number, since it uses less digits than its factorization.

256441677340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98982 (or 98980 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 49.

The spelling of 256441677340 in words is "two hundred fifty-six billion, four hundred forty-one million, six hundred seventy-seven thousand, three hundred forty".