12891560238 has 16 divisors (see below), whose sum is σ = 28647911760. Its totient is φ = 4297186728.

The previous prime is 12891560179. The next prime is 12891560281. The reversal of 12891560238 is 83206519821.

12891560238 is a `hidden beast` number, since 1 + 2 + 8 + 9 + 1 + 5 + 602 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 12891560193 and 12891560202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119366245 + ... + 119366352.

It is an arithmetic number, because the mean of its divisors is an integer number (1790494485).

Almost surely, 2^12891560238 is an apocalyptic number.

12891560238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12891560238 is an abundant number, since it is smaller than the sum of its proper divisors (15756351522).

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

12891560238 is a wasteful number, since it uses less digits than its factorization.

12891560238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238732608 (or 238732602 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 12891560238 in words is "twelve billion, eight hundred ninety-one million, five hundred sixty thousand, two hundred thirty-eight".