109664638 has 8 divisors (see below), whose sum is σ = 164588688. Its totient is φ = 54801744.

The previous prime is 109664629. The next prime is 109664647. The reversal of 109664638 is 836466901.

It is an interprime number because it is at equal distance from previous prime (109664629) and next prime (109664647).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 109664594 and 109664603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10506 + ... + 18157.

It is an arithmetic number, because the mean of its divisors is an integer number (20573586).

Almost surely, 2^109664638 is an apocalyptic number.

109664638 is a deficient number, since it is larger than the sum of its proper divisors (54924050).

109664638 is a wasteful number, since it uses less digits than its factorization.

109664638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30578.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 109664638 is about 10472.0885213982. The cubic root of 109664638 is about 478.6545627103.

The spelling of 109664638 in words is "one hundred nine million, six hundred sixty-four thousand, six hundred thirty-eight".