52431313649 has 16 divisors (see below), whose sum is σ = 61633462464. Its totient is φ = 43972708800.

The previous prime is 52431313643. The next prime is 52431313681. The reversal of 52431313649 is 94631313425.

52431313649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52431313649 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 142034 + ... + 353604.

It is an arithmetic number, because the mean of its divisors is an integer number (3852091404).

Almost surely, 2^52431313649 is an apocalyptic number.

It is an amenable number.

52431313649 is a deficient number, since it is larger than the sum of its proper divisors (9202148815).

52431313649 is a wasteful number, since it uses less digits than its factorization.

52431313649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213328.

The product of its digits is 233280, while the sum is 41.

The spelling of 52431313649 in words is "fifty-two billion, four hundred thirty-one million, three hundred thirteen thousand, six hundred forty-nine".