90191884827 has 16 divisors (see below), whose sum is σ = 133035920640. Its totient is φ = 53891863200.

The previous prime is 90191884819. The next prime is 90191884873. The reversal of 90191884827 is 72848819109.

It is not a de Polignac number, because 90191884827 - 2³ = 90191884819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90191884807) 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, 19244752 + ... + 19249437.

It is an arithmetic number, because the mean of its divisors is an integer number (8314745040).

Almost surely, 2^90191884827 is an apocalyptic number.

90191884827 is a deficient number, since it is larger than the sum of its proper divisors (42844035813).

90191884827 is a wasteful number, since it uses less digits than its factorization.

90191884827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38494274.

The product of its (nonzero) digits is 2322432, while the sum is 57.

The spelling of 90191884827 in words is "ninety billion, one hundred ninety-one million, eight hundred eighty-four thousand, eight hundred twenty-seven".