91044836780 has 24 divisors (see below), whose sum is σ = 191199869952. Its totient is φ = 36416846592.

The previous prime is 91044836737. The next prime is 91044836819. The reversal of 91044836780 is 8763844019.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1151189 + ... + 1227731.

It is an arithmetic number, because the mean of its divisors is an integer number (7966661248).

Almost surely, 2^91044836780 is an apocalyptic number.

It is an amenable number.

91044836780 is an abundant number, since it is smaller than the sum of its proper divisors (100155033172).

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

91044836780 is a wasteful number, since it uses less digits than its factorization.

91044836780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136025 (or 136023 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 91044836780 in words is "ninety-one billion, forty-four million, eight hundred thirty-six thousand, seven hundred eighty".