91551600 has 360 divisors, whose sum is σ = 381247920. Its totient is φ = 20805120.

The previous prime is 91551527. The next prime is 91551623. The reversal of 91551600 is 615519.

91551600 = T₃₅ + T₃₆ + ... + T₈₁₈.

91551600 is a `hidden beast` number, since 9 + 1 + 5 + 51 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 529114 + ... + 529286.

It is an arithmetic number, because the mean of its divisors is an integer number (1059022).

Almost surely, 2^91551600 is an apocalyptic number.

91551600 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 91551600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190623960).

91551600 is an abundant number, since it is smaller than the sum of its proper divisors (289696320).

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

91551600 is a wasteful number, since it uses less digits than its factorization.

91551600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 91551600 is about 9568.2600299114. The cubic root of 91551600 is about 450.7011292499.

The spelling of 91551600 in words is "ninety-one million, five hundred fifty-one thousand, six hundred".