90665117219 has 4 divisors (see below), whose sum is σ = 91221345096. Its totient is φ = 90108889344.

The previous prime is 90665117189. The next prime is 90665117251. The reversal of 90665117219 is 91271156609.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90665117219 - 2⁸ = 90665116963 is a prime.

It is a super-2 number, since 2×90665117219² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90665117419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278113694 + ... + 278114019.

It is an arithmetic number, because the mean of its divisors is an integer number (22805336274).

Almost surely, 2^90665117219 is an apocalyptic number.

90665117219 is a deficient number, since it is larger than the sum of its proper divisors (556227877).

90665117219 is a wasteful number, since it uses less digits than its factorization.

90665117219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556227876.

The product of its (nonzero) digits is 204120, while the sum is 47.

The spelling of 90665117219 in words is "ninety billion, six hundred sixty-five million, one hundred seventeen thousand, two hundred nineteen".