90840810885 has 64 divisors (see below), whose sum is σ = 160429731840. Its totient is φ = 43525601280.

The previous prime is 90840810859. The next prime is 90840810901. The reversal of 90840810885 is 58801804809.

It is a happy number.

It is not a de Polignac number, because 90840810885 - 2¹¹ = 90840808837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11887896 + ... + 11895534.

It is an arithmetic number, because the mean of its divisors is an integer number (2506714560).

Almost surely, 2^90840810885 is an apocalyptic number.

It is an amenable number.

90840810885 is a deficient number, since it is larger than the sum of its proper divisors (69588920955).

90840810885 is a wasteful number, since it uses less digits than its factorization.

90840810885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8498.

The product of its (nonzero) digits is 737280, while the sum is 51.

The spelling of 90840810885 in words is "ninety billion, eight hundred forty million, eight hundred ten thousand, eight hundred eighty-five".