31140718632 has 24 divisors (see below), whose sum is σ = 84339446490. Its totient is φ = 10380239520.

The previous prime is 31140718619. The next prime is 31140718639. The reversal of 31140718632 is 23681704113.

It is a happy number.

31140718632 is a `hidden beast` number, since 3 + 1 + 1 + 4 + 0 + 7 + 18 + 632 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29263576356 + 1877142276 = 171066^2 + 43326^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is not an unprimeable number, because it can be changed into a prime (31140718639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216254919 + ... + 216255062.

Almost surely, 2^31140718632 is an apocalyptic number.

It is an amenable number.

31140718632 is an abundant number, since it is smaller than the sum of its proper divisors (53198727858).

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

31140718632 is a wasteful number, since it uses less digits than its factorization.

31140718632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432509993 (or 432509986 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 31140718632 in words is "thirty-one billion, one hundred forty million, seven hundred eighteen thousand, six hundred thirty-two".