123872181169 has 8 divisors (see below), whose sum is σ = 136105472160. Its totient is φ = 111800920800.

The previous prime is 123872181137. The next prime is 123872181179. The reversal of 123872181169 is 961181278321.

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

It is a cyclic number.

It is not a de Polignac number, because 123872181169 - 2⁵ = 123872181137 is a prime.

It is a super-2 number, since 2×123872181169² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123872181179) 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, 40506052 + ... + 40509109.

It is an arithmetic number, because the mean of its divisors is an integer number (17013184020).

Almost surely, 2^123872181169 is an apocalyptic number.

It is an amenable number.

123872181169 is a deficient number, since it is larger than the sum of its proper divisors (12233290991).

123872181169 is a wasteful number, since it uses less digits than its factorization.

123872181169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81015311.

The product of its digits is 290304, while the sum is 49.

The spelling of 123872181169 in words is "one hundred twenty-three billion, eight hundred seventy-two million, one hundred eighty-one thousand, one hundred sixty-nine".