91764616136 has 16 divisors (see below), whose sum is σ = 172062380400. Its totient is φ = 45881314704.

The previous prime is 91764616093. The next prime is 91764616243. The reversal of 91764616136 is 63161646719.

It is a happy number.

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, 397211 + ... + 584213.

It is an arithmetic number, because the mean of its divisors is an integer number (10753898775).

Almost surely, 2^91764616136 is an apocalyptic number.

It is an amenable number.

91764616136 is a deficient number, since it is larger than the sum of its proper divisors (80297764264).

91764616136 is a wasteful number, since it uses less digits than its factorization.

91764616136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248348 (or 248344 counting only the distinct ones).

The product of its digits is 979776, while the sum is 50.

The spelling of 91764616136 in words is "ninety-one billion, seven hundred sixty-four million, six hundred sixteen thousand, one hundred thirty-six".