91816877754 has 32 divisors (see below), whose sum is σ = 233185722240. Its totient is φ = 26233393536.

The previous prime is 91816877723. The next prime is 91816877771. The reversal of 91816877754 is 45777861819.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 91816877691 and 91816877700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121450519 + ... + 121451274.

It is an arithmetic number, because the mean of its divisors is an integer number (7287053820).

Almost surely, 2^91816877754 is an apocalyptic number.

91816877754 is an abundant number, since it is smaller than the sum of its proper divisors (141368844486).

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

91816877754 is a wasteful number, since it uses less digits than its factorization.

91816877754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242901811 (or 242901805 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 63.

The spelling of 91816877754 in words is "ninety-one billion, eight hundred sixteen million, eight hundred seventy-seven thousand, seven hundred fifty-four".