109661144 has 8 divisors (see below), whose sum is σ = 205614660. Its totient is φ = 54830568.

The previous prime is 109661143. The next prime is 109661159. The reversal of 109661144 is 441166901.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 109661144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109661143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6853814 + ... + 6853829.

Almost surely, 2^109661144 is an apocalyptic number.

It is an amenable number.

109661144 is a deficient number, since it is larger than the sum of its proper divisors (95953516).

109661144 is a wasteful number, since it uses less digits than its factorization.

109661144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13707649 (or 13707645 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 109661144 is about 10471.9216956583. The cubic root of 109661144 is about 478.6494792217.

The spelling of 109661144 in words is "one hundred nine million, six hundred sixty-one thousand, one hundred forty-four".