90844098817 has 4 divisors (see below), whose sum is σ = 90856852416. Its totient is φ = 90831345220.

The previous prime is 90844098803. The next prime is 90844098841. The reversal of 90844098817 is 71889044809.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90844098817 - 2⁷ = 90844098689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90844098617) 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, 6366109 + ... + 6380362.

It is an arithmetic number, because the mean of its divisors is an integer number (22714213104).

Almost surely, 2^90844098817 is an apocalyptic number.

It is an amenable number.

90844098817 is a deficient number, since it is larger than the sum of its proper divisors (12753599).

90844098817 is a wasteful number, since it uses less digits than its factorization.

90844098817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12753598.

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 90844098817 in words is "ninety billion, eight hundred forty-four million, ninety-eight thousand, eight hundred seventeen".