556256261531 has 4 divisors (see below), whose sum is σ = 569823487464. Its totient is φ = 542689035600.

The previous prime is 556256261521. The next prime is 556256261551. The reversal of 556256261531 is 135162652655.

556256261531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 556256261531 - 2¹⁰ = 556256260507 is a prime.

It is a super-2 number, since 2×556256261531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556256261521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6783612905 + ... + 6783612986.

It is an arithmetic number, because the mean of its divisors is an integer number (142455871866).

Almost surely, 2^556256261531 is an apocalyptic number.

556256261531 is a deficient number, since it is larger than the sum of its proper divisors (13567225933).

556256261531 is a wasteful number, since it uses less digits than its factorization.

556256261531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13567225932.

The product of its digits is 1620000, while the sum is 47.

The spelling of 556256261531 in words is "five hundred fifty-six billion, two hundred fifty-six million, two hundred sixty-one thousand, five hundred thirty-one".