91625968980 has 1152 divisors, whose sum is σ = 378310732800. Its totient is φ = 17414258688.

The previous prime is 91625968937. The next prime is 91625969003. The reversal of 91625968980 is 8986952619.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nialpdrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 840605166 + ... + 840605274.

Almost surely, 2^91625968980 is an apocalyptic number.

91625968980 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91625968980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189155366400).

91625968980 is an abundant number, since it is smaller than the sum of its proper divisors (286684763820).

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

91625968980 is a wasteful number, since it uses less digits than its factorization.

91625968980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 63.

The spelling of 91625968980 in words is "ninety-one billion, six hundred twenty-five million, nine hundred sixty-eight thousand, nine hundred eighty".