90394966558899 has 6 divisors (see below), whose sum is σ = 130570507251756. Its totient is φ = 60263311039260.

The previous prime is 90394966558847. The next prime is 90394966558943. The reversal of 90394966558899 is 99885566949309.

It is a happy number.

90394966558899 is a `hidden beast` number, since 9 + 0 + 3 + 9 + 49 + 6 + 6 + 558 + 8 + 9 + 9 = 666.

It is not a de Polignac number, because 90394966558899 - 2²³ = 90394958170291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90394966458899) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5021942586597 + ... + 5021942586614.

It is an arithmetic number, because the mean of its divisors is an integer number (21761751208626).

Almost surely, 2^{90394966558899} is an apocalyptic number.

90394966558899 is a deficient number, since it is larger than the sum of its proper divisors (40175540692857).

90394966558899 is a wasteful number, since it uses less digits than its factorization.

90394966558899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10043885173217 (or 10043885173214 counting only the distinct ones).

The product of its (nonzero) digits is 40814668800, while the sum is 90.

The spelling of 90394966558899 in words is "ninety trillion, three hundred ninety-four billion, nine hundred sixty-six million, five hundred fifty-eight thousand, eight hundred ninety-nine".