91017038404 has 12 divisors (see below), whose sum is σ = 162668749824. Its totient is φ = 44540252744.

The previous prime is 91017038377. The next prime is 91017038423. The reversal of 91017038404 is 40483071019.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242066404 + ... + 242066779.

It is an arithmetic number, because the mean of its divisors is an integer number (13555729152).

Almost surely, 2^91017038404 is an apocalyptic number.

91017038404 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

It is an amenable number.

91017038404 is a deficient number, since it is larger than the sum of its proper divisors (71651711420).

91017038404 is a wasteful number, since it uses less digits than its factorization.

91017038404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484133234 (or 484133232 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 91017038404 in words is "ninety-one billion, seventeen million, thirty-eight thousand, four hundred four".