91573340880 has 320 divisors, whose sum is σ = 342480936960. Its totient is φ = 19772854272.

The previous prime is 91573340839. The next prime is 91573340941. The reversal of 91573340880 is 8804337519.

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, 11710732 + ... + 11718548.

It is an arithmetic number, because the mean of its divisors is an integer number (1070252928).

Almost surely, 2^91573340880 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 91573340880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171240468480).

91573340880 is an abundant number, since it is smaller than the sum of its proper divisors (250907596080).

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

91573340880 is a wasteful number, since it uses less digits than its factorization.

91573340880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8226 (or 8220 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 91573340880 in words is "ninety-one billion, five hundred seventy-three million, three hundred forty thousand, eight hundred eighty".