109161612 has 108 divisors (see below), whose sum is σ = 337984920. Its totient is φ = 29538432.

The previous prime is 109161601. The next prime is 109161617. The reversal of 109161612 is 216161901.

109161612 is nontrivially palindromic in base 13.

It is not an unprimeable number, because it can be changed into a prime (109161617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 31888 + ... + 35144.

It is an arithmetic number, because the mean of its divisors is an integer number (3129490).

Almost surely, 2^109161612 is an apocalyptic number.

109161612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109161612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168992460).

109161612 is an abundant number, since it is smaller than the sum of its proper divisors (228823308).

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

109161612 is a wasteful number, since it uses less digits than its factorization.

109161612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300 (or 3288 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 109161612 is about 10448.0434532021. The cubic root of 109161612 is about 477.9215863157.

The spelling of 109161612 in words is "one hundred nine million, one hundred sixty-one thousand, six hundred twelve".