12621615198 has 32 divisors (see below), whose sum is σ = 25426694400. Its totient is φ = 4176722880.

The previous prime is 12621615191. The next prime is 12621615211. The reversal of 12621615198 is 89151612621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621615191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534093 + ... + 557223.

It is an arithmetic number, because the mean of its divisors is an integer number (794584200).

Almost surely, 2^12621615198 is an apocalyptic number.

12621615198 is an abundant number, since it is smaller than the sum of its proper divisors (12805079202).

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

12621615198 is a wasteful number, since it uses less digits than its factorization.

12621615198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23792.

The product of its digits is 51840, while the sum is 42.

The spelling of 12621615198 in words is "twelve billion, six hundred twenty-one million, six hundred fifteen thousand, one hundred ninety-eight".