31601658745 has 16 divisors (see below), whose sum is σ = 38953972368. Its totient is φ = 24593587200.

The previous prime is 31601658733. The next prime is 31601658769. The reversal of 31601658745 is 54785610613.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8620008336 + 22981650409 = 92844^2 + 151597^2 .

It is not a de Polignac number, because 31601658745 - 2⁹ = 31601658233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31601658695 and 31601658704.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1315845 + ... + 1339645.

It is an arithmetic number, because the mean of its divisors is an integer number (2434623273).

Almost surely, 2^31601658745 is an apocalyptic number.

It is an amenable number.

31601658745 is a deficient number, since it is larger than the sum of its proper divisors (7352313623).

31601658745 is a wasteful number, since it uses less digits than its factorization.

31601658745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31020.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 31601658745 in words is "thirty-one billion, six hundred one million, six hundred fifty-eight thousand, seven hundred forty-five".