31440463613 has 4 divisors (see below), whose sum is σ = 33858960828. Its totient is φ = 29021966400.

The previous prime is 31440463597. The next prime is 31440463667. The reversal of 31440463613 is 31636404413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31636404413 = 29 ⋅1090910497.

It can be written as a sum of positive squares in 2 ways, for example, as 7513942489 + 23926521124 = 86683^2 + 154682^2 .

It is a cyclic number.

It is not a de Polignac number, because 31440463613 - 2⁴ = 31440463597 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 (31440493613) 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, 1209248588 + ... + 1209248613.

It is an arithmetic number, because the mean of its divisors is an integer number (8464740207).

Almost surely, 2^31440463613 is an apocalyptic number.

It is an amenable number.

31440463613 is a deficient number, since it is larger than the sum of its proper divisors (2418497215).

31440463613 is a wasteful number, since it uses less digits than its factorization.

31440463613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418497214.

The product of its (nonzero) digits is 62208, while the sum is 35.

The spelling of 31440463613 in words is "thirty-one billion, four hundred forty million, four hundred sixty-three thousand, six hundred thirteen".