91267722000 has 1600 divisors, whose sum is σ = 418391221248. Its totient is φ = 18662400000.

The previous prime is 91267721999. The next prime is 91267722043. The reversal of 91267722000 is 22776219.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 604421925 + ... + 604422075.

Almost surely, 2^91267722000 is an apocalyptic number.

91267722000 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 91267722000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209195610624).

91267722000 is an abundant number, since it is smaller than the sum of its proper divisors (327123499248).

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

91267722000 is a wasteful number, since it uses less digits than its factorization.

91267722000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The spelling of 91267722000 in words is "ninety-one billion, two hundred sixty-seven million, seven hundred twenty-two thousand".