256543756632 has 48 divisors (see below), whose sum is σ = 720539568840. Its totient is φ = 85514584896.

The previous prime is 256543756619. The next prime is 256543756633. The reversal of 256543756632 is 236657345652.

256543756632 is a `hidden beast` number, since 2 + 5 + 6 + 5 + 43 + 7 + 566 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256543756633) 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, 65981533 + ... + 65985420.

Almost surely, 2^256543756632 is an apocalyptic number.

It is an amenable number.

256543756632 is an abundant number, since it is smaller than the sum of its proper divisors (463995812208).

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

256543756632 is a wasteful number, since it uses less digits than its factorization.

256543756632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131966974 (or 131966958 counting only the distinct ones).

The product of its digits is 27216000, while the sum is 54.

The spelling of 256543756632 in words is "two hundred fifty-six billion, five hundred forty-three million, seven hundred fifty-six thousand, six hundred thirty-two".