99945618 has 32 divisors (see below), whose sum is σ = 216820800. Its totient is φ = 30589440.

The previous prime is 99945617. The next prime is 99945623. The reversal of 99945618 is 81654999.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (99945611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7768 + ... + 16131.

It is an arithmetic number, because the mean of its divisors is an integer number (6775650).

Almost surely, 2^99945618 is an apocalyptic number.

99945618 is an abundant number, since it is smaller than the sum of its proper divisors (116875182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99945618 is a wasteful number, since it uses less digits than its factorization.

99945618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23962.

The product of its digits is 699840, while the sum is 51.

The square root of 99945618 is about 9997.2805302242. The cubic root of 99945618 is about 464.0747284764.

The spelling of 99945618 in words is "ninety-nine million, nine hundred forty-five thousand, six hundred eighteen".