91961616 has 40 divisors (see below), whose sum is σ = 237931200. Its totient is φ = 30606976.

The previous prime is 91961599. The next prime is 91961629. The reversal of 91961616 is 61616919.

It is a super-3 number, since 3×91961616³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46210 + ... + 48158.

It is an arithmetic number, because the mean of its divisors is an integer number (5948280).

Almost surely, 2^91961616 is an apocalyptic number.

It is an amenable number.

91961616 is an abundant number, since it is smaller than the sum of its proper divisors (145969584).

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

91961616 is a wasteful number, since it uses less digits than its factorization.

91961616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943 (or 2937 counting only the distinct ones).

The product of its digits is 17496, while the sum is 39.

The square root of 91961616 is about 9589.6619335616. The cubic root of 91961616 is about 451.3729525330.

The spelling of 91961616 in words is "ninety-one million, nine hundred sixty-one thousand, six hundred sixteen".