311909478056 has 32 divisors (see below), whose sum is σ = 652833799200. Its totient is φ = 138479893440.

The previous prime is 311909478029. The next prime is 311909478059. The reversal of 311909478056 is 650874909113.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 311909477989 and 311909478007.

It is not an unprimeable number, because it can be changed into a prime (311909478059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41210471 + ... + 41218038.

It is an arithmetic number, because the mean of its divisors is an integer number (20401056225).

Almost surely, 2^311909478056 is an apocalyptic number.

It is an amenable number.

311909478056 is an abundant number, since it is smaller than the sum of its proper divisors (340924321144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311909478056 is a wasteful number, since it uses less digits than its factorization.

311909478056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82428569 (or 82428565 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 311909478056 in words is "three hundred eleven billion, nine hundred nine million, four hundred seventy-eight thousand, fifty-six".