31697061120 has 108 divisors (see below), whose sum is σ = 109668569556. Its totient is φ = 8452546560.

The previous prime is 31697061101. The next prime is 31697061131. The reversal of 31697061120 is 2116079613.

31697061120 is a `hidden beast` number, since 3 + 16 + 9 + 7 + 0 + 611 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4764312576 + 26932748544 = 69024^2 + 164112^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1364221 + ... + 1387260.

Almost surely, 2^31697061120 is an apocalyptic number.

31697061120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31697061120 is an abundant number, since it is smaller than the sum of its proper divisors (77971508436).

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

31697061120 is a wasteful number, since it uses less digits than its factorization.

31697061120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751508 (or 2751491 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The spelling of 31697061120 in words is "thirty-one billion, six hundred ninety-seven million, sixty-one thousand, one hundred twenty".