91989496764 has 36 divisors (see below), whose sum is σ = 253668007320. Its totient is φ = 27875604960.

The previous prime is 91989496763. The next prime is 91989496787. The reversal of 91989496764 is 46769498919.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 91989496692 and 91989496701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91989496763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116147959 + ... + 116148750.

Almost surely, 2^91989496764 is an apocalyptic number.

It is an amenable number.

91989496764 is an abundant number, since it is smaller than the sum of its proper divisors (161678510556).

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

91989496764 is a wasteful number, since it uses less digits than its factorization.

91989496764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232296730 (or 232296725 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 72.

The spelling of 91989496764 in words is "ninety-one billion, nine hundred eighty-nine million, four hundred ninety-six thousand, seven hundred sixty-four".