91715524992 has 672 divisors, whose sum is σ = 343408096080. Its totient is φ = 24173033472.

The previous prime is 91715524981. The next prime is 91715524993. The reversal of 91715524992 is 29942551719.

It is a happy number.

91715524992 is a `hidden beast` number, since 9 + 17 + 15 + 524 + 9 + 92 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91715524993) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 59438973 + ... + 59440515.

Almost surely, 2^91715524992 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 91715524992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171704048040).

91715524992 is an abundant number, since it is smaller than the sum of its proper divisors (251692571088).

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

91715524992 is a wasteful number, since it uses less digits than its factorization.

91715524992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602 (or 1568 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 54.

The spelling of 91715524992 in words is "ninety-one billion, seven hundred fifteen million, five hundred twenty-four thousand, nine hundred ninety-two".