12165398994 has 64 divisors (see below), whose sum is σ = 27974580480. Its totient is φ = 3454894080.

The previous prime is 12165398939. The next prime is 12165399023. The reversal of 12165398994 is 49989356121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8633362 + ... + 8634770.

It is an arithmetic number, because the mean of its divisors is an integer number (437102820).

Almost surely, 2^12165398994 is an apocalyptic number.

12165398994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12165398994 is an abundant number, since it is smaller than the sum of its proper divisors (15809181486).

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

12165398994 is a wasteful number, since it uses less digits than its factorization.

12165398994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515.

The product of its digits is 4199040, while the sum is 57.

The spelling of 12165398994 in words is "twelve billion, one hundred sixty-five million, three hundred ninety-eight thousand, nine hundred ninety-four".