91615104 has 192 divisors, whose sum is σ = 315118800. Its totient is φ = 26127360.

The previous prime is 91615081. The next prime is 91615109. The reversal of 91615104 is 40151619.

91615104 is a `hidden beast` number, since 91 + 61 + 510 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91615109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169074 + ... + 169614.

Almost surely, 2^91615104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91615104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157559400).

91615104 is an abundant number, since it is smaller than the sum of its proper divisors (223503696).

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

91615104 is a wasteful number, since it uses less digits than its factorization.

91615104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 91615104 is about 9571.5779263400. The cubic root of 91615104 is about 450.8053135184.

It can be divided in two parts, 91615 and 104, that added together give a palindrome (91719).

The spelling of 91615104 in words is "ninety-one million, six hundred fifteen thousand, one hundred four".