91492423680 has 768 divisors, whose sum is σ = 360097920000. Its totient is φ = 19768541184.

The previous prime is 91492423679. The next prime is 91492423723. The reversal of 91492423680 is 8632429419.

It is a tau number, because it is divible by the number of its divisors (768).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 200202012 + ... + 200202468.

It is an arithmetic number, because the mean of its divisors is an integer number (468877500).

Almost surely, 2^91492423680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91492423680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180048960000).

91492423680 is an abundant number, since it is smaller than the sum of its proper divisors (268605496320).

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

91492423680 is a wasteful number, since it uses less digits than its factorization.

91492423680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 91492423680 in words is "ninety-one billion, four hundred ninety-two million, four hundred twenty-three thousand, six hundred eighty".