31557027140 has 12 divisors (see below), whose sum is σ = 66269757036. Its totient is φ = 12622810848.

The previous prime is 31557027119. The next prime is 31557027181. The reversal of 31557027140 is 4172075513.

It can be written as a sum of positive squares in 2 ways, for example, as 18622969156 + 12934057984 = 136466^2 + 113728^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31557027140.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788925659 + ... + 788925698.

It is an arithmetic number, because the mean of its divisors is an integer number (5522479753).

Almost surely, 2^31557027140 is an apocalyptic number.

It is an amenable number.

31557027140 is an abundant number, since it is smaller than the sum of its proper divisors (34712729896).

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

31557027140 is a wasteful number, since it uses less digits than its factorization.

31557027140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577851366 (or 1577851364 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 31557027140 in words is "thirty-one billion, five hundred fifty-seven million, twenty-seven thousand, one hundred forty".