109872688509 has 6 divisors (see below), whose sum is σ = 158704994526. Its totient is φ = 73248459000.

The previous prime is 109872688507. The next prime is 109872688543. The reversal of 109872688509 is 905886278901.

It is a happy number.

109872688509 is a `hidden beast` number, since 10 + 98 + 7 + 26 + 8 + 8 + 509 = 666.

It can be written as a sum of positive squares in only one way, i.e., 75843507609 + 34029180900 = 275397^2 + 184470^2 .

It is not a de Polignac number, because 109872688509 - 2¹ = 109872688507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109872688507) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6104038242 + ... + 6104038259.

It is an arithmetic number, because the mean of its divisors is an integer number (26450832421).

Almost surely, 2^109872688509 is an apocalyptic number.

It is an amenable number.

109872688509 is a deficient number, since it is larger than the sum of its proper divisors (48832306017).

109872688509 is a wasteful number, since it uses less digits than its factorization.

109872688509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12208076507 (or 12208076504 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 63.

The spelling of 109872688509 in words is "one hundred nine billion, eight hundred seventy-two million, six hundred eighty-eight thousand, five hundred nine".