91318237146 has 24 divisors (see below), whose sum is σ = 198081820404. Its totient is φ = 30404698560.

The previous prime is 91318237139. The next prime is 91318237163. The reversal of 91318237146 is 64173281319.

91318237146 is a `hidden beast` number, since 91 + 318 + 237 + 14 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 74783106225 + 16535130921 = 273465^2 + 128589^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2876595 + ... + 2908166.

Almost surely, 2^91318237146 is an apocalyptic number.

91318237146 is an abundant number, since it is smaller than the sum of its proper divisors (106763583258).

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

91318237146 is a wasteful number, since it uses less digits than its factorization.

91318237146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5785646 (or 5785643 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 91318237146 in words is "ninety-one billion, three hundred eighteen million, two hundred thirty-seven thousand, one hundred forty-six".