91679803788 has 18 divisors (see below), whose sum is σ = 213921989596. Its totient is φ = 30559584968.

The previous prime is 91679803771. The next prime is 91679803801. The reversal of 91679803788 is 88730897619.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1005181 + ... + 1092587.

Almost surely, 2^91679803788 is an apocalyptic number.

It is an amenable number.

91679803788 is an abundant number, since it is smaller than the sum of its proper divisors (122242185808).

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

91679803788 is an frugal number, since it uses more digits than its factorization.

91679803788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174821 (or 87412 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 66.

The spelling of 91679803788 in words is "ninety-one billion, six hundred seventy-nine million, eight hundred three thousand, seven hundred eighty-eight".