91899922500 has 405 divisors, whose sum is σ = 303650918571. Its totient is φ = 23427432000.

The previous prime is 91899922489. The next prime is 91899922507. The reversal of 91899922500 is 522999819.

The square root of 91899922500 is 303150.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 7204953924 + 84694968576 = 84882^2 + 291024^2 .

It is not an unprimeable number, because it can be changed into a prime (91899922507) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 1955317477 + ... + 1955317523.

Almost surely, 2^91899922500 is an apocalyptic number.

91899922500 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

91899922500 is the 303150-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91899922500

91899922500 is an abundant number, since it is smaller than the sum of its proper divisors (211750996071).

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

91899922500 is a wasteful number, since it uses less digits than its factorization.

91899922500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The spelling of 91899922500 in words is "ninety-one billion, eight hundred ninety-nine million, nine hundred twenty-two thousand, five hundred".