256611477204471 has 64 divisors (see below), whose sum is σ = 363829186068480. Its totient is φ = 160618641120000.

The previous prime is 256611477204469. The next prime is 256611477204497. The reversal of 256611477204471 is 174402774116652.

It is not a de Polignac number, because 256611477204471 - 2¹ = 256611477204469 is a prime.

It is a super-3 number, since 3×256611477204471³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256611477204451) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9589712590 + ... + 9589739348.

It is an arithmetic number, because the mean of its divisors is an integer number (5684831032320).

Almost surely, 2^{256611477204471} is an apocalyptic number.

256611477204471 is a deficient number, since it is larger than the sum of its proper divisors (107217708864009).

256611477204471 is a wasteful number, since it uses less digits than its factorization.

256611477204471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42868.

The product of its (nonzero) digits is 15805440, while the sum is 57.

The spelling of 256611477204471 in words is "two hundred fifty-six trillion, six hundred eleven billion, four hundred seventy-seven million, two hundred four thousand, four hundred seventy-one".