90289281191 has 16 divisors (see below), whose sum is σ = 93368588256. Its totient is φ = 87244200576.

The previous prime is 90289281163. The next prime is 90289281197. The reversal of 90289281191 is 19118298209.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90289281191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90289281197) 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, 18510845 + ... + 18515721.

It is an arithmetic number, because the mean of its divisors is an integer number (5835536766).

Almost surely, 2^90289281191 is an apocalyptic number.

90289281191 is a deficient number, since it is larger than the sum of its proper divisors (3079307065).

90289281191 is a wasteful number, since it uses less digits than its factorization.

90289281191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8258.

The product of its (nonzero) digits is 186624, while the sum is 50.

The spelling of 90289281191 in words is "ninety billion, two hundred eighty-nine million, two hundred eighty-one thousand, one hundred ninety-one".