256567032654534 has 24 divisors (see below), whose sum is σ = 635308842763920. Its totient is φ = 73304866472688.

The previous prime is 256567032654481. The next prime is 256567032654539. The reversal of 256567032654534 is 435456230765652.

256567032654534 is a `hidden beast` number, since 2 + 5 + 6 + 5 + 6 + 7 + 0 + 32 + 65 + 4 + 534 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256567032654539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1018123145329 + ... + 1018123145580.

It is an arithmetic number, because the mean of its divisors is an integer number (26471201781830).

Almost surely, 2^{256567032654534} is an apocalyptic number.

256567032654534 is an abundant number, since it is smaller than the sum of its proper divisors (378741810109386).

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

256567032654534 is a wasteful number, since it uses less digits than its factorization.

256567032654534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036246290924 (or 2036246290921 counting only the distinct ones).

The product of its (nonzero) digits is 544320000, while the sum is 63.

The spelling of 256567032654534 in words is "two hundred fifty-six trillion, five hundred sixty-seven billion, thirty-two million, six hundred fifty-four thousand, five hundred thirty-four".