90909155161 has 16 divisors (see below), whose sum is σ = 99934974720. Its totient is φ = 82010800080.

The previous prime is 90909155123. The next prime is 90909155167. The reversal of 90909155161 is 16155190909.

It is not a de Polignac number, because 90909155161 - 2⁷ = 90909155033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90909155167) 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, 3453130 + ... + 3479356.

It is an arithmetic number, because the mean of its divisors is an integer number (6245935920).

Almost surely, 2^90909155161 is an apocalyptic number.

It is an amenable number.

90909155161 is a deficient number, since it is larger than the sum of its proper divisors (9025819559).

90909155161 is a wasteful number, since it uses less digits than its factorization.

90909155161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28644.

The product of its (nonzero) digits is 109350, while the sum is 46.

The spelling of 90909155161 in words is "ninety billion, nine hundred nine million, one hundred fifty-five thousand, one hundred sixty-one".