31636345253 has 12 divisors (see below), whose sum is σ = 32805117540. Its totient is φ = 30507918336.

The previous prime is 31636345243. The next prime is 31636345291. The reversal of 31636345253 is 35254363613.

It can be written as a sum of positive squares in 6 ways, for example, as 257057089 + 31379288164 = 16033^2 + 177142^2 .

It is not a de Polignac number, because 31636345253 - 2⁶ = 31636345189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31636345253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31636345243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 674501 + ... + 719877.

It is an arithmetic number, because the mean of its divisors is an integer number (2733759795).

Almost surely, 2^31636345253 is an apocalyptic number.

It is an amenable number.

31636345253 is a deficient number, since it is larger than the sum of its proper divisors (1168772287).

31636345253 is an equidigital number, since it uses as much as digits as its factorization.

31636345253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46264 (or 46235 counting only the distinct ones).

The product of its digits is 583200, while the sum is 41.

The spelling of 31636345253 in words is "thirty-one billion, six hundred thirty-six million, three hundred forty-five thousand, two hundred fifty-three".