90271452091 has 4 divisors (see below), whose sum is σ = 90431792712. Its totient is φ = 90111111472.

The previous prime is 90271452077. The next prime is 90271452101. The reversal of 90271452091 is 19025417209.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19025417209 = 43 ⋅442451563.

It is a cyclic number.

It is not a de Polignac number, because 90271452091 - 2¹⁵ = 90271419323 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90271452391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80169466 + ... + 80170591.

It is an arithmetic number, because the mean of its divisors is an integer number (22607948178).

Almost surely, 2^90271452091 is an apocalyptic number.

90271452091 is a deficient number, since it is larger than the sum of its proper divisors (160340621).

90271452091 is a wasteful number, since it uses less digits than its factorization.

90271452091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160340620.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 90271452091 in words is "ninety billion, two hundred seventy-one million, four hundred fifty-two thousand, ninety-one".