90911019291 has 32 divisors (see below), whose sum is σ = 128987443200. Its totient is φ = 56791342080.

The previous prime is 90911019271. The next prime is 90911019301. The reversal of 90911019291 is 19291011909.

It is not a de Polignac number, because 90911019291 - 2⁵ = 90911019259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90911019211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11667825 + ... + 11675613.

It is an arithmetic number, because the mean of its divisors is an integer number (4030857600).

Almost surely, 2^90911019291 is an apocalyptic number.

90911019291 is a deficient number, since it is larger than the sum of its proper divisors (38076423909).

90911019291 is a wasteful number, since it uses less digits than its factorization.

90911019291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10019.

The product of its (nonzero) digits is 13122, while the sum is 42.

The spelling of 90911019291 in words is "ninety billion, nine hundred eleven million, nineteen thousand, two hundred ninety-one".