31653860725 has 6 divisors (see below), whose sum is σ = 39250787330. Its totient is φ = 25323088560.

The previous prime is 31653860723. The next prime is 31653860729. The reversal of 31653860725 is 52706835613.

It can be written as a sum of positive squares in 3 ways, for example, as 513611569 + 31140249156 = 22663^2 + 176466^2 .

It is not a de Polignac number, because 31653860725 - 2¹ = 31653860723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31653860723) by changing a digit.

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, 633077190 + ... + 633077239.

Almost surely, 2^31653860725 is an apocalyptic number.

It is an amenable number.

31653860725 is a deficient number, since it is larger than the sum of its proper divisors (7596926605).

31653860725 is a wasteful number, since it uses less digits than its factorization.

31653860725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266154439 (or 1266154434 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 31653860725 in words is "thirty-one billion, six hundred fifty-three million, eight hundred sixty thousand, seven hundred twenty-five".