256611477232072 has 16 divisors (see below), whose sum is σ = 481147713956700. Its totient is φ = 128305420176960.

The previous prime is 256611477231983. The next prime is 256611477232081. The reversal of 256611477232072 is 270232774116652.

It can be written as a sum of positive squares in 2 ways, for example, as 246484787627556 + 10126689604516 = 15699834^2 + 3182246^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36362547 + ... + 42842242.

Almost surely, 2^{256611477232072} is an apocalyptic number.

It is an amenable number.

256611477232072 is a deficient number, since it is larger than the sum of its proper divisors (224536236724628).

256611477232072 is a wasteful number, since it uses less digits than its factorization.

256611477232072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79609776 (or 79609772 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 55.

The spelling of 256611477232072 in words is "two hundred fifty-six trillion, six hundred eleven billion, four hundred seventy-seven million, two hundred thirty-two thousand, seventy-two".