31704631690 has 16 divisors (see below), whose sum is σ = 57070372680. Its totient is φ = 12681400320.

The previous prime is 31704631649. The next prime is 31704631723. The reversal of 31704631690 is 9613640713.

It can be written as a sum of positive squares in 4 ways, for example, as 26262471249 + 5442160441 = 162057^2 + 73771^2 .

It is a super-2 number, since 2×31704631690² (a number of 22 digits) contains 22 as substring.

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, 482746 + ... + 544474.

Almost surely, 2^31704631690 is an apocalyptic number.

31704631690 is a deficient number, since it is larger than the sum of its proper divisors (25365740990).

31704631690 is a wasteful number, since it uses less digits than its factorization.

31704631690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113097.

The product of its (nonzero) digits is 81648, while the sum is 40.

The spelling of 31704631690 in words is "thirty-one billion, seven hundred four million, six hundred thirty-one thousand, six hundred ninety".