91818416 has 40 divisors (see below), whose sum is σ = 183043344. Its totient is φ = 44593920.

The previous prime is 91818413. The next prime is 91818421. The reversal of 91818416 is 61481819.

It is a self number, because there is not a number n which added to its sum of digits gives 91818416.

It is not an unprimeable number, because it can be changed into a prime (91818413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217886 + ... + 218306.

Almost surely, 2^91818416 is an apocalyptic number.

It is an amenable number.

91818416 is a deficient number, since it is larger than the sum of its proper divisors (91224928).

91818416 is a wasteful number, since it uses less digits than its factorization.

91818416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 783 counting only the distinct ones).

The product of its digits is 13824, while the sum is 38.

The square root of 91818416 is about 9582.1926509542. The cubic root of 91818416 is about 451.1385424651.

The spelling of 91818416 in words is "ninety-one million, eight hundred eighteen thousand, four hundred sixteen".