91913226763664 has 20 divisors (see below), whose sum is σ = 178082072677104. Its totient is φ = 45956562847008.

The previous prime is 91913226763643. The next prime is 91913226763667. The reversal of 91913226763664 is 46636762231919.

It is a self number, because there is not a number n which added to its sum of digits gives 91913226763664.

It is not an unprimeable number, because it can be changed into a prime (91913226763667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15015779 + ... + 20231165.

Almost surely, 2^{91913226763664} is an apocalyptic number.

It is an amenable number.

91913226763664 is a deficient number, since it is larger than the sum of its proper divisors (86168845913440).

91913226763664 is a wasteful number, since it uses less digits than its factorization.

91913226763664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6316862 (or 6316856 counting only the distinct ones).

The product of its digits is 105815808, while the sum is 65.

The spelling of 91913226763664 in words is "ninety-one trillion, nine hundred thirteen billion, two hundred twenty-six million, seven hundred sixty-three thousand, six hundred sixty-four".