31761618994 has 48 divisors (see below), whose sum is σ = 56819387520. Its totient is φ = 13269157440.

The previous prime is 31761618899. The next prime is 31761619049. The reversal of 31761618994 is 49981616713.

It is a super-2 number, since 2×31761618994² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6454467 + ... + 6459385.

It is an arithmetic number, because the mean of its divisors is an integer number (1183737240).

Almost surely, 2^31761618994 is an apocalyptic number.

31761618994 is a deficient number, since it is larger than the sum of its proper divisors (25057768526).

31761618994 is a wasteful number, since it uses less digits than its factorization.

31761618994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6583 (or 6576 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 55.

It can be divided in two parts, 317616 and 18994, that added together give a triangular number (336610 = T₈₂₀).

The spelling of 31761618994 in words is "thirty-one billion, seven hundred sixty-one million, six hundred eighteen thousand, nine hundred ninety-four".