91364763712 has 28 divisors (see below), whose sum is σ = 181334219500. Its totient is φ = 45674251776.

The previous prime is 91364763701. The next prime is 91364763761. The reversal of 91364763712 is 21736746319.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17345943616 + 74018820096 = 131704^2 + 272064^2 .

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, 243778 + ... + 492094.

It is an arithmetic number, because the mean of its divisors is an integer number (6476222125).

Almost surely, 2^91364763712 is an apocalyptic number.

It is an amenable number.

91364763712 is a deficient number, since it is larger than the sum of its proper divisors (89969455788).

91364763712 is a wasteful number, since it uses less digits than its factorization.

91364763712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254078 (or 254068 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 49.

The spelling of 91364763712 in words is "ninety-one billion, three hundred sixty-four million, seven hundred sixty-three thousand, seven hundred twelve".