91616616 has 256 divisors, whose sum is σ = 322560000. Its totient is φ = 23452416.

The previous prime is 91616611. The next prime is 91616627. The reversal of 91616616 is 61661619.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91616611) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1159665 + ... + 1159743.

It is an arithmetic number, because the mean of its divisors is an integer number (1260000).

Almost surely, 2^91616616 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 91616616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161280000).

91616616 is an abundant number, since it is smaller than the sum of its proper divisors (230943384).

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

91616616 is a wasteful number, since it uses less digits than its factorization.

91616616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 163 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 91616616 is about 9571.6569098563. The cubic root of 91616616 is about 450.8077935093.

The spelling of 91616616 in words is "ninety-one million, six hundred sixteen thousand, six hundred sixteen".