91949275784 has 16 divisors (see below), whose sum is σ = 172430225820. Its totient is φ = 45967882240.

The previous prime is 91949275763. The next prime is 91949275829. The reversal of 91949275784 is 48757294919.

It can be written as a sum of positive squares in 2 ways, for example, as 91916899684 + 32376100 = 303178^2 + 5690^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 91949275784.

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, 786377 + ... + 895704.

Almost surely, 2^91949275784 is an apocalyptic number.

It is an amenable number.

91949275784 is a deficient number, since it is larger than the sum of its proper divisors (80480950036).

91949275784 is a wasteful number, since it uses less digits than its factorization.

91949275784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688920 (or 1688916 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 65.

The spelling of 91949275784 in words is "ninety-one billion, nine hundred forty-nine million, two hundred seventy-five thousand, seven hundred eighty-four".