91615416 has 64 divisors (see below), whose sum is σ = 248908800. Its totient is φ = 27993600.

The previous prime is 91615373. The next prime is 91615423. The reversal of 91615416 is 61451619.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10896 + ... + 17376.

It is an arithmetic number, because the mean of its divisors is an integer number (3889200).

Almost surely, 2^91615416 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 91615416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124454400).

91615416 is an abundant number, since it is smaller than the sum of its proper divisors (157293384).

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

91615416 is a wasteful number, since it uses less digits than its factorization.

91615416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540 (or 6536 counting only the distinct ones).

The product of its digits is 6480, while the sum is 33.

The square root of 91615416 is about 9571.5942245793. The cubic root of 91615416 is about 450.8058252648.

The spelling of 91615416 in words is "ninety-one million, six hundred fifteen thousand, four hundred sixteen".