31642151120 has 40 divisors (see below), whose sum is σ = 73829861640. Its totient is φ = 12611809280.

The previous prime is 31642151117. The next prime is 31642151137. The reversal of 31642151120 is 2115124613.

It can be written as a sum of positive squares in 4 ways, for example, as 80496784 + 31561654336 = 8972^2 + 177656^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 31642151120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681305 + ... + 726264.

It is an arithmetic number, because the mean of its divisors is an integer number (1845746541).

Almost surely, 2^31642151120 is an apocalyptic number.

It is an amenable number.

31642151120 is an abundant number, since it is smaller than the sum of its proper divisors (42187710520).

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

31642151120 is a wasteful number, since it uses less digits than its factorization.

31642151120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407863 (or 1407857 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 31642151120 its reverse (2115124613), we get a palindrome (33757275733).

The spelling of 31642151120 in words is "thirty-one billion, six hundred forty-two million, one hundred fifty-one thousand, one hundred twenty".