109641816 has 64 divisors (see below), whose sum is σ = 307759200. Its totient is φ = 36163584.

The previous prime is 109641781. The next prime is 109641817. The reversal of 109641816 is 618146901.

It is a happy number.

109641816 is a `hidden beast` number, since 1 + 0 + 9 + 641 + 8 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109641817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18336 + ... + 23568.

Almost surely, 2^109641816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109641816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153879600).

109641816 is an abundant number, since it is smaller than the sum of its proper divisors (198117384).

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

109641816 is a wasteful number, since it uses less digits than its factorization.

109641816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5345 (or 5335 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 109641816 is about 10470.9988062267. The cubic root of 109641816 is about 478.6213565875.

The spelling of 109641816 in words is "one hundred nine million, six hundred forty-one thousand, eight hundred sixteen".