31456665413 has 4 divisors (see below), whose sum is σ = 31570227660. Its totient is φ = 31343103168.

The previous prime is 31456665403. The next prime is 31456665451.

31456665413 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6925901284 + 24530764129 = 83222^2 + 156623^2 .

It is a cyclic number.

It is not a de Polignac number, because 31456665413 - 2¹² = 31456661317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31456665403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56780708 + ... + 56781261.

It is an arithmetic number, because the mean of its divisors is an integer number (7892556915).

Almost surely, 2^31456665413 is an apocalyptic number.

It is an amenable number.

31456665413 is a deficient number, since it is larger than the sum of its proper divisors (113562247).

31456665413 is a wasteful number, since it uses less digits than its factorization.

31456665413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113562246.

The product of its digits is 777600, while the sum is 44.

The spelling of 31456665413 in words is "thirty-one billion, four hundred fifty-six million, six hundred sixty-five thousand, four hundred thirteen".