90894981099 has 32 divisors (see below), whose sum is σ = 132599864320. Its totient is φ = 55046863872.

The previous prime is 90894981017. The next prime is 90894981109. The reversal of 90894981099 is 99018949809.

It is a de Polignac number, because none of the positive numbers 2^k-90894981099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90894981799) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 897819 + ... + 993915.

It is an arithmetic number, because the mean of its divisors is an integer number (4143745760).

Almost surely, 2^90894981099 is an apocalyptic number.

90894981099 is a deficient number, since it is larger than the sum of its proper divisors (41704883221).

90894981099 is a wasteful number, since it uses less digits than its factorization.

90894981099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96499.

The product of its (nonzero) digits is 15116544, while the sum is 66.

The spelling of 90894981099 in words is "ninety billion, eight hundred ninety-four million, nine hundred eighty-one thousand, ninety-nine".