91919520000 has 1080 divisors, whose sum is σ = 413394421440. Its totient is φ = 19077120000.

The previous prime is 91919519983. The next prime is 91919520019. The reversal of 91919520000 is 2591919.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 110879586 + ... + 110880414.

Almost surely, 2^91919520000 is an apocalyptic number.

91919520000 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 91919520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206697210720).

91919520000 is an abundant number, since it is smaller than the sum of its proper divisors (321474901440).

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

91919520000 is a wasteful number, since it uses less digits than its factorization.

91919520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The spelling of 91919520000 in words is "ninety-one billion, nine hundred nineteen million, five hundred twenty thousand".