31440404413 has 18 divisors (see below), whose sum is σ = 36473107902. Its totient is φ = 27077822640.

The previous prime is 31440404407. The next prime is 31440404417.

It is a happy number.

31440404413 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 25363110564 + 6077293849 = 159258^2 + 77957^2 .

It is not a de Polignac number, because 31440404413 - 2³³ = 22850469821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440404417) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 316206 + ... + 403567.

Almost surely, 2^31440404413 is an apocalyptic number.

It is an amenable number.

31440404413 is a deficient number, since it is larger than the sum of its proper divisors (5032703489).

31440404413 is a wasteful number, since it uses less digits than its factorization.

31440404413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719833 (or 719803 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The spelling of 31440404413 in words is "thirty-one billion, four hundred forty million, four hundred four thousand, four hundred thirteen".