31636660536 has 80 divisors (see below), whose sum is σ = 95428271400. Its totient is φ = 9734354496.

The previous prime is 31636660499. The next prime is 31636660537. The reversal of 31636660536 is 63506663613.

It is a junction number, because it is equal to n+sod(n) for n = 31636660491 and 31636660500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31636660537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1869346 + ... + 1886193.

Almost surely, 2^31636660536 is an apocalyptic number.

31636660536 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31636660536 is an abundant number, since it is smaller than the sum of its proper divisors (63791610864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31636660536 is a wasteful number, since it uses less digits than its factorization.

31636660536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3755570 (or 3755557 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 45.

The spelling of 31636660536 in words is "thirty-one billion, six hundred thirty-six million, six hundred sixty thousand, five hundred thirty-six".