91949768436 has 24 divisors (see below), whose sum is σ = 227170016640. Its totient is φ = 28846986112.

The previous prime is 91949768389. The next prime is 91949768507. The reversal of 91949768436 is 63486794919.

It is a congruent number.

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, 225366876 + ... + 225367283.

It is an arithmetic number, because the mean of its divisors is an integer number (9465417360).

Almost surely, 2^91949768436 is an apocalyptic number.

It is an amenable number.

91949768436 is an abundant number, since it is smaller than the sum of its proper divisors (135220248204).

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

91949768436 is a wasteful number, since it uses less digits than its factorization.

91949768436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450734183 (or 450734181 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 66.

The spelling of 91949768436 in words is "ninety-one billion, nine hundred forty-nine million, seven hundred sixty-eight thousand, four hundred thirty-six".