91976789412 has 96 divisors (see below), whose sum is σ = 257406508800. Its totient is φ = 28314671616.

The previous prime is 91976789363. The next prime is 91976789431. The reversal of 91976789412 is 21498767919.

It is a self number, because there is not a number n which added to its sum of digits gives 91976789412.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 566373 + ... + 710444.

It is an arithmetic number, because the mean of its divisors is an integer number (2681317800).

Almost surely, 2^91976789412 is an apocalyptic number.

91976789412 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

91976789412 is an abundant number, since it is smaller than the sum of its proper divisors (165429719388).

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

91976789412 is a wasteful number, since it uses less digits than its factorization.

91976789412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276882 (or 1276874 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 63.

The spelling of 91976789412 in words is "ninety-one billion, nine hundred seventy-six million, seven hundred eighty-nine thousand, four hundred twelve".