311400621879 has 32 divisors (see below), whose sum is σ = 444633767424. Its totient is φ = 193375902720.

The previous prime is 311400621871. The next prime is 311400621893. The reversal of 311400621879 is 978126004113.

It is a happy number.

It is not a de Polignac number, because 311400621879 - 2³ = 311400621871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311400621879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311400621871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1446847 + ... + 1648079.

It is an arithmetic number, because the mean of its divisors is an integer number (13894805232).

Almost surely, 2^311400621879 is an apocalyptic number.

311400621879 is a deficient number, since it is larger than the sum of its proper divisors (133233145545).

311400621879 is a wasteful number, since it uses less digits than its factorization.

311400621879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201847.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 311400621879 in words is "three hundred eleven billion, four hundred million, six hundred twenty-one thousand, eight hundred seventy-nine".