31550198969664 has 42 divisors (see below), whose sum is σ = 90432948784490. Its totient is φ = 10516732989696.

The previous prime is 31550198969617. The next prime is 31550198969687. The reversal of 31550198969664 is 46696989105513.

31550198969664 is a `hidden beast` number, since 3 + 1 + 550 + 1 + 9 + 8 + 9 + 6 + 9 + 6 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 31178733099264 + 371465870400 = 5583792^2 + 609480^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 31550198969592 and 31550198969601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27387324919 + ... + 27387326070.

Almost surely, 2^{31550198969664} is an apocalyptic number.

It is an amenable number.

31550198969664 is an abundant number, since it is smaller than the sum of its proper divisors (58882749814826).

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

31550198969664 is a wasteful number, since it uses less digits than its factorization.

31550198969664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54774651007 (or 54774650994 counting only the distinct ones).

The product of its (nonzero) digits is 377913600, while the sum is 72.

The spelling of 31550198969664 in words is "thirty-one trillion, five hundred fifty billion, one hundred ninety-eight million, nine hundred sixty-nine thousand, six hundred sixty-four".