109090909090900 has 72 divisors (see below), whose sum is σ = 261359354993184. Its totient is φ = 39191476617600.

The previous prime is 109090909090879. The next prime is 109090909090907. The reversal of 109090909090900 is 9090909090901.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109090909090907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 597339747 + ... + 597522346.

It is an arithmetic number, because the mean of its divisors is an integer number (3629991041572).

Almost surely, 2^{109090909090900} is an apocalyptic number.

109090909090900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109090909090900 is an abundant number, since it is smaller than the sum of its proper divisors (152268445902284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109090909090900 is a wasteful number, since it uses less digits than its factorization.

109090909090900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194862201 (or 1194862194 counting only the distinct ones).

The product of its (nonzero) digits is 531441, while the sum is 55.

Subtracting from 109090909090900 its reverse (9090909090901), we obtain a palindrome (99999999999999).

The spelling of 109090909090900 in words is "one hundred nine trillion, ninety billion, nine hundred nine million, ninety thousand, nine hundred".