256069627840 has 112 divisors (see below), whose sum is σ = 685222026048. Its totient is φ = 90437935104.

The previous prime is 256069627819. The next prime is 256069627871. The reversal of 256069627840 is 48726960652.

It is a super-2 number, since 2×256069627840² (a number of 24 digits) contains 22 as substring.

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, 1242477 + ... + 1433836.

It is an arithmetic number, because the mean of its divisors is an integer number (6118053804).

Almost surely, 2^256069627840 is an apocalyptic number.

256069627840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256069627840 is an abundant number, since it is smaller than the sum of its proper divisors (429152398208).

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

256069627840 is a wasteful number, since it uses less digits than its factorization.

256069627840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676366 (or 2676356 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 256069627840 in words is "two hundred fifty-six billion, sixty-nine million, six hundred twenty-seven thousand, eight hundred forty".