90344108889 has 10 divisors (see below), whose sum is σ = 134958483770. Its totient is φ = 60229405872.

The previous prime is 90344108879. The next prime is 90344108917. The reversal of 90344108889 is 98880144309.

It can be written as a sum of positive squares in only one way, i.e., 86548932864 + 3795176025 = 294192^2 + 61605^2 .

It is not a de Polignac number, because 90344108889 - 2⁴ = 90344108873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90344108819) 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 9 ways as a sum of consecutive naturals, for example, 557679604 + ... + 557679765.

It is an arithmetic number, because the mean of its divisors is an integer number (13495848377).

Almost surely, 2^90344108889 is an apocalyptic number.

It is an amenable number.

90344108889 is a deficient number, since it is larger than the sum of its proper divisors (44614374881).

90344108889 is a wasteful number, since it uses less digits than its factorization.

90344108889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115359381 (or 1115359372 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 90344108889 in words is "ninety billion, three hundred forty-four million, one hundred eight thousand, eight hundred eighty-nine".