31660993607 has 4 divisors (see below), whose sum is σ = 31825040400. Its totient is φ = 31496946816.

The previous prime is 31660993603. The next prime is 31660993619. The reversal of 31660993607 is 70639906613.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31660993607 - 2² = 31660993603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31660993601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82023107 + ... + 82023492.

It is an arithmetic number, because the mean of its divisors is an integer number (7956260100).

Almost surely, 2^31660993607 is an apocalyptic number.

31660993607 is a deficient number, since it is larger than the sum of its proper divisors (164046793).

31660993607 is a wasteful number, since it uses less digits than its factorization.

31660993607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164046792.

The product of its (nonzero) digits is 1102248, while the sum is 50.

The spelling of 31660993607 in words is "thirty-one billion, six hundred sixty million, nine hundred ninety-three thousand, six hundred seven".