99518669607990 has 64 divisors (see below), whose sum is σ = 251550686096640. Its totient is φ = 25128048666240.

The previous prime is 99518669607983. The next prime is 99518669608021. The reversal of 99518669607990 is 9970696681599.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45847924 + ... + 47969463.

It is an arithmetic number, because the mean of its divisors is an integer number (3930479470260).

Almost surely, 2^{99518669607990} is an apocalyptic number.

99518669607990 is an abundant number, since it is smaller than the sum of its proper divisors (152032016488650).

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

99518669607990 is a wasteful number, since it uses less digits than its factorization.

99518669607990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93819277.

The product of its (nonzero) digits is 3571283520, while the sum is 84.

The spelling of 99518669607990 in words is "ninety-nine trillion, five hundred eighteen billion, six hundred sixty-nine million, six hundred seven thousand, nine hundred ninety".