91516018 has 32 divisors (see below), whose sum is σ = 155675520. Its totient is φ = 39984000.

The previous prime is 91516013. The next prime is 91516031. The reversal of 91516018 is 81061519.

It is not an unprimeable number, because it can be changed into a prime (91516013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63328 + ... + 64756.

It is an arithmetic number, because the mean of its divisors is an integer number (4864860).

Almost surely, 2^91516018 is an apocalyptic number.

91516018 is a deficient number, since it is larger than the sum of its proper divisors (64159502).

91516018 is a wasteful number, since it uses less digits than its factorization.

91516018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 91516018 is about 9566.4004724870. The cubic root of 91516018 is about 450.6427325803.

The spelling of 91516018 in words is "ninety-one million, five hundred sixteen thousand, eighteen".