91394220960 has 576 divisors, whose sum is σ = 368384889600. Its totient is φ = 20211959808.

The previous prime is 91394220947. The next prime is 91394220989. The reversal of 91394220960 is 6902249319.

It is a happy number.

91394220960 is a `hidden beast` number, since 9 + 139 + 422 + 0 + 96 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 510582151 + ... + 510582329.

It is an arithmetic number, because the mean of its divisors is an integer number (639557100).

Almost surely, 2^91394220960 is an apocalyptic number.

91394220960 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 91394220960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184192444800).

91394220960 is an abundant number, since it is smaller than the sum of its proper divisors (276990668640).

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

91394220960 is a wasteful number, since it uses less digits than its factorization.

91394220960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 91394220960 in words is "ninety-one billion, three hundred ninety-four million, two hundred twenty thousand, nine hundred sixty".