91441618 has 8 divisors (see below), whose sum is σ = 137249712. Its totient is φ = 45691716.

The previous prime is 91441601. The next prime is 91441627. The reversal of 91441618 is 81614419.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10380 + ... + 17047.

It is an arithmetic number, because the mean of its divisors is an integer number (17156214).

Almost surely, 2^91441618 is an apocalyptic number.

91441618 is a deficient number, since it is larger than the sum of its proper divisors (45808094).

91441618 is a wasteful number, since it uses less digits than its factorization.

91441618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29096.

The product of its digits is 6912, while the sum is 34.

The square root of 91441618 is about 9562.5110718890. The cubic root of 91441618 is about 450.5205794320.

The spelling of 91441618 in words is "ninety-one million, four hundred forty-one thousand, six hundred eighteen".