109664538 has 16 divisors (see below), whose sum is σ = 219459456. Its totient is φ = 36533120.

The previous prime is 109664537. The next prime is 109664549. The reversal of 109664538 is 835466901.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 109664538.

It is not an unprimeable number, because it can be changed into a prime (109664537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8095 + ... + 16877.

It is an arithmetic number, because the mean of its divisors is an integer number (13716216).

Almost surely, 2^109664538 is an apocalyptic number.

109664538 is an abundant number, since it is smaller than the sum of its proper divisors (109794918).

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

109664538 is a wasteful number, since it uses less digits than its factorization.

109664538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10869.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 109664538 is about 10472.0837468003. The cubic root of 109664538 is about 478.6544172198.

The spelling of 109664538 in words is "one hundred nine million, six hundred sixty-four thousand, five hundred thirty-eight".