91445500618 has 8 divisors (see below), whose sum is σ = 137234554020. Its totient is φ = 45700649280.

The previous prime is 91445500609. The next prime is 91445500621. The reversal of 91445500618 is 81600554419.

It can be written as a sum of positive squares in 2 ways, for example, as 91443945609 + 1555009 = 302397^2 + 1247^2 .

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, 11045343 + ... + 11053618.

Almost surely, 2^91445500618 is an apocalyptic number.

91445500618 is a deficient number, since it is larger than the sum of its proper divisors (45789053402).

91445500618 is a wasteful number, since it uses less digits than its factorization.

91445500618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22101032.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 91445500618 in words is "ninety-one billion, four hundred forty-five million, five hundred thousand, six hundred eighteen".