73131978662 has 32 divisors (see below), whose sum is σ = 114446794752. Its totient is φ = 35020152544.

The previous prime is 73131978653. The next prime is 73131978679. The reversal of 73131978662 is 26687913137.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

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, 1888943 + ... + 1927269.

It is an arithmetic number, because the mean of its divisors is an integer number (3576462336).

Almost surely, 2^73131978662 is an apocalyptic number.

73131978662 is a deficient number, since it is larger than the sum of its proper divisors (41314816090).

73131978662 is a wasteful number, since it uses less digits than its factorization.

73131978662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38812.

The product of its digits is 2286144, while the sum is 53.

The spelling of 73131978662 in words is "seventy-three billion, one hundred thirty-one million, nine hundred seventy-eight thousand, six hundred sixty-two".