31661737983 has 6 divisors (see below), whose sum is σ = 45733621544. Its totient is φ = 21107825316.

The previous prime is 31661737963. The next prime is 31661738011. The reversal of 31661737983 is 38973716613.

31661737983 is a `hidden beast` number, since 3 + 16 + 617 + 3 + 7 + 9 + 8 + 3 = 666.

It is not a de Polignac number, because 31661737983 - 2⁸ = 31661737727 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 (31661737963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1758985435 + ... + 1758985452.

Almost surely, 2^31661737983 is an apocalyptic number.

31661737983 is a deficient number, since it is larger than the sum of its proper divisors (14071883561).

31661737983 is a wasteful number, since it uses less digits than its factorization.

31661737983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517970893 (or 3517970890 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The spelling of 31661737983 in words is "thirty-one billion, six hundred sixty-one million, seven hundred thirty-seven thousand, nine hundred eighty-three".