256100656320 has 168 divisors, whose sum is σ = 904687480944. Its totient is φ = 66447710208.

The previous prime is 256100656303. The next prime is 256100656333. The reversal of 256100656320 is 23656001652.

It is a happy number.

256100656320 is a `hidden beast` number, since 2 + 5 + 6 + 10 + 0 + 6 + 5 + 632 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1095114 + ... + 1308233.

Almost surely, 2^256100656320 is an apocalyptic number.

256100656320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256100656320 is an abundant number, since it is smaller than the sum of its proper divisors (648586824624).

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

256100656320 is a wasteful number, since it uses less digits than its factorization.

256100656320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403407 (or 2403394 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 256100656320 its reverse (23656001652), we get a palindrome (279756657972).

The spelling of 256100656320 in words is "two hundred fifty-six billion, one hundred million, six hundred fifty-six thousand, three hundred twenty".