76720091904 has 54 divisors (see below), whose sum is σ = 221202945236. Its totient is φ = 25573363200.

The previous prime is 76720091897. The next prime is 76720091941. The reversal of 76720091904 is 40919002767.

It is a self number, because there is not a number n which added to its sum of digits gives 76720091904.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 16647022 + ... + 16651629.

Almost surely, 2^76720091904 is an apocalyptic number.

It is an amenable number.

76720091904 is an abundant number, since it is smaller than the sum of its proper divisors (144482853332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

76720091904 is a wasteful number, since it uses less digits than its factorization.

76720091904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33298673 (or 33298656 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 76720091904 in words is "seventy-six billion, seven hundred twenty million, ninety-one thousand, nine hundred four".