90880008809 has 4 divisors (see below), whose sum is σ = 90881275716. Its totient is φ = 90878741904.

The previous prime is 90880008781. The next prime is 90880008829.

90880008809 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21748875625 + 69131133184 = 147475^2 + 262928^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90880008809 is a prime.

It is a super-2 number, since 2×90880008809² (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 (90880008829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518954 + ... + 671619.

It is an arithmetic number, because the mean of its divisors is an integer number (22720318929).

Almost surely, 2^90880008809 is an apocalyptic number.

It is an amenable number.

90880008809 is a deficient number, since it is larger than the sum of its proper divisors (1266907).

90880008809 is a wasteful number, since it uses less digits than its factorization.

90880008809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266906.

The product of its (nonzero) digits is 331776, while the sum is 50.

The spelling of 90880008809 in words is "ninety billion, eight hundred eighty million, eight thousand, eight hundred nine".