90198209901 has 16 divisors (see below), whose sum is σ = 129741269184. Its totient is φ = 55527124224.

The previous prime is 90198209897. The next prime is 90198209939. The reversal of 90198209901 is 10990289109.

It is not a de Polignac number, because 90198209901 - 2² = 90198209897 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90198209201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16682131 + ... + 16687536.

It is an arithmetic number, because the mean of its divisors is an integer number (8108829324).

Almost surely, 2^90198209901 is an apocalyptic number.

It is an amenable number.

90198209901 is a deficient number, since it is larger than the sum of its proper divisors (39543059283).

90198209901 is a wasteful number, since it uses less digits than its factorization.

90198209901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33369740.

The product of its (nonzero) digits is 104976, while the sum is 48.

The spelling of 90198209901 in words is "ninety billion, one hundred ninety-eight million, two hundred nine thousand, nine hundred one".