90806057198 has 8 divisors (see below), whose sum is σ = 137933251680. Its totient is φ = 44828306640.

The previous prime is 90806057191. The next prime is 90806057201. The reversal of 90806057198 is 89175060809.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×90806057198² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90806057191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287360783 + ... + 287361098.

It is an arithmetic number, because the mean of its divisors is an integer number (17241656460).

Almost surely, 2^90806057198 is an apocalyptic number.

90806057198 is a deficient number, since it is larger than the sum of its proper divisors (47127194482).

90806057198 is a wasteful number, since it uses less digits than its factorization.

90806057198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574721962.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 90806057198 in words is "ninety billion, eight hundred six million, fifty-seven thousand, one hundred ninety-eight".