91568816 has 30 divisors (see below), whose sum is σ = 179308836. Its totient is φ = 45300000.

The previous prime is 91568803. The next prime is 91568839. The reversal of 91568816 is 61886519.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 364691 + ... + 364941.

Almost surely, 2^91568816 is an apocalyptic number.

It is an amenable number.

91568816 is a deficient number, since it is larger than the sum of its proper divisors (87740020).

91568816 is a wasteful number, since it uses less digits than its factorization.

91568816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 404 counting only the distinct ones).

The product of its digits is 103680, while the sum is 44.

The square root of 91568816 is about 9569.1596287239. The cubic root of 91568816 is about 450.7293784716.

The spelling of 91568816 in words is "ninety-one million, five hundred sixty-eight thousand, eight hundred sixteen".