56400501311 has 24 divisors (see below), whose sum is σ = 72553683024. Its totient is φ = 43346378880.

The previous prime is 56400501293. The next prime is 56400501343. The reversal of 56400501311 is 11310500465.

It is a de Polignac number, because none of the positive numbers 2^k-56400501311 is a prime.

It is a super-2 number, since 2×56400501311² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56400503311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 677360 + ... + 756053.

It is an arithmetic number, because the mean of its divisors is an integer number (3023070126).

Almost surely, 2^56400501311 is an apocalyptic number.

56400501311 is a deficient number, since it is larger than the sum of its proper divisors (16153181713).

56400501311 is a wasteful number, since it uses less digits than its factorization.

56400501311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433511 (or 1433504 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 56400501311 in words is "fifty-six billion, four hundred million, five hundred one thousand, three hundred eleven".