90399694698 has 24 divisors (see below), whose sum is σ = 196399714368. Its totient is φ = 30051122472.

The previous prime is 90399694691. The next prime is 90399694699. The reversal of 90399694698 is 89649699309.

It is a happy number.

90399694698 is a `hidden beast` number, since 90 + 399 + 6 + 94 + 69 + 8 = 666.

It is a super-2 number, since 2×90399694698² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90399694691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6835636 + ... + 6848847.

It is an arithmetic number, because the mean of its divisors is an integer number (8183321432).

Almost surely, 2^90399694698 is an apocalyptic number.

90399694698 is an abundant number, since it is smaller than the sum of its proper divisors (106000019670).

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

90399694698 is a wasteful number, since it uses less digits than its factorization.

90399694698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13684858 (or 13684855 counting only the distinct ones).

The product of its (nonzero) digits is 204073344, while the sum is 72.

The spelling of 90399694698 in words is "ninety billion, three hundred ninety-nine million, six hundred ninety-four thousand, six hundred ninety-eight".