90111011109 has 32 divisors (see below), whose sum is σ = 137859262464. Its totient is φ = 51286996800.

The previous prime is 90111011083. The next prime is 90111011153.

90111011109 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 90111011109 - 2⁵ = 90111011077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90111010109) 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, 15398034 + ... + 15403884.

It is an arithmetic number, because the mean of its divisors is an integer number (4308101952).

Almost surely, 2^90111011109 is an apocalyptic number.

It is an amenable number.

90111011109 is a deficient number, since it is larger than the sum of its proper divisors (47748251355).

90111011109 is a wasteful number, since it uses less digits than its factorization.

90111011109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8657.

The product of its (nonzero) digits is 81, while the sum is 24.

It can be divided in two parts, 901110 and 11109, that added together give a palindrome (912219).

The spelling of 90111011109 in words is "ninety billion, one hundred eleven million, eleven thousand, one hundred nine".