90868489894 has 16 divisors (see below), whose sum is σ = 167757212448. Its totient is φ = 35947973952.

The previous prime is 90868489849. The next prime is 90868489931. The reversal of 90868489894 is 49898486809.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249638527 + ... + 249638890.

It is an arithmetic number, because the mean of its divisors is an integer number (10484825778).

Almost surely, 2^90868489894 is an apocalyptic number.

90868489894 is a deficient number, since it is larger than the sum of its proper divisors (76888722554).

90868489894 is a wasteful number, since it uses less digits than its factorization.

90868489894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499277439.

The product of its (nonzero) digits is 286654464, while the sum is 73.

The spelling of 90868489894 in words is "ninety billion, eight hundred sixty-eight million, four hundred eighty-nine thousand, eight hundred ninety-four".