91099452600 has 480 divisors, whose sum is σ = 341822028240. Its totient is φ = 22353408000.

The previous prime is 91099452599. The next prime is 91099452601. The reversal of 91099452600 is 625499019.

It is an interprime number because it is at equal distance from previous prime (91099452599) and next prime (91099452601).

It is a super-2 number, since 2×91099452600² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91099452601) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 103404160 + ... + 103405040.

Almost surely, 2^91099452600 is an apocalyptic number.

91099452600 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 91099452600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170911014120).

91099452600 is an abundant number, since it is smaller than the sum of its proper divisors (250722575640).

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

91099452600 is a wasteful number, since it uses less digits than its factorization.

91099452600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413 (or 1395 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 91099452600 in words is "ninety-one billion, ninety-nine million, four hundred fifty-two thousand, six hundred".