52431313644 has 18 divisors (see below), whose sum is σ = 132534709580. Its totient is φ = 17477104536.

The previous prime is 52431313643. The next prime is 52431313681. The reversal of 52431313644 is 44631313425.

52431313644 is a `hidden beast` number, since 5 + 2 + 4 + 3 + 1 + 3 + 1 + 3 + 644 = 666.

52431313644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1456425379 = 52431313644 / (5 + 2 + 4 + 3 + 1 + 3 + 1 + 3 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 52431313599 and 52431313608.

It is not an unprimeable number, because it can be changed into a prime (52431313643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 728212654 + ... + 728212725.

Almost surely, 2^52431313644 is an apocalyptic number.

It is an amenable number.

52431313644 is an abundant number, since it is smaller than the sum of its proper divisors (80103395936).

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

52431313644 is a wasteful number, since it uses less digits than its factorization.

52431313644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456425389 (or 1456425384 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The spelling of 52431313644 in words is "fifty-two billion, four hundred thirty-one million, three hundred thirteen thousand, six hundred forty-four".