31899413650 has 48 divisors (see below), whose sum is σ = 64164643200. Its totient is φ = 11728906560.

The previous prime is 31899413641. The next prime is 31899413653. The reversal of 31899413650 is 5631499813.

It is a junction number, because it is equal to n+sod(n) for n = 31899413594 and 31899413603.

It is not an unprimeable number, because it can be changed into a prime (31899413653) 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 23 ways as a sum of consecutive naturals, for example, 52681 + ... + 258019.

It is an arithmetic number, because the mean of its divisors is an integer number (1336763400).

Almost surely, 2^31899413650 is an apocalyptic number.

31899413650 is an abundant number, since it is smaller than the sum of its proper divisors (32265229550).

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

31899413650 is a wasteful number, since it uses less digits than its factorization.

31899413650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205603 (or 205598 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 31899413650 in words is "thirty-one billion, eight hundred ninety-nine million, four hundred thirteen thousand, six hundred fifty".