31331402660545 has 64 divisors (see below), whose sum is σ = 41833879617600. Its totient is φ = 22383500525568.

The previous prime is 31331402660533. The next prime is 31331402660563. The reversal of 31331402660545 is 54506620413313.

It can be written as a sum of positive squares in 32 ways, for example, as 20864805975601 + 10466596684944 = 4567801^2 + 3235212^2 .

It is not a de Polignac number, because 31331402660545 - 2¹¹ = 31331402658497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 70100017 + ... + 70545553.

It is an arithmetic number, because the mean of its divisors is an integer number (653654369025).

Almost surely, 2^{31331402660545} is an apocalyptic number.

It is an amenable number.

31331402660545 is a deficient number, since it is larger than the sum of its proper divisors (10502476957055).

31331402660545 is a wasteful number, since it uses less digits than its factorization.

31331402660545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445894.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 31331402660545 in words is "thirty-one trillion, three hundred thirty-one billion, four hundred two million, six hundred sixty thousand, five hundred forty-five".