90084817838 has 16 divisors (see below), whose sum is σ = 142245588240. Its totient is φ = 42669835200.

The previous prime is 90084817829. The next prime is 90084817847. The reversal of 90084817838 is 83871848009.

It is an interprime number because it is at equal distance from previous prime (90084817829) and next prime (90084817847).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1160978 + ... + 1236138.

It is an arithmetic number, because the mean of its divisors is an integer number (8890349265).

Almost surely, 2^90084817838 is an apocalyptic number.

90084817838 is a deficient number, since it is larger than the sum of its proper divisors (52160770402).

90084817838 is a wasteful number, since it uses less digits than its factorization.

90084817838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106723.

The product of its (nonzero) digits is 3096576, while the sum is 56.

The spelling of 90084817838 in words is "ninety billion, eighty-four million, eight hundred seventeen thousand, eight hundred thirty-eight".