12605561998 has 8 divisors (see below), whose sum is σ = 19075673808. Its totient is φ = 6247004064.

The previous prime is 12605561939. The next prime is 12605562001. The reversal of 12605561998 is 89916550621.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27888186 + ... + 27888637.

It is an arithmetic number, because the mean of its divisors is an integer number (2384459226).

Almost surely, 2^12605561998 is an apocalyptic number.

12605561998 is a deficient number, since it is larger than the sum of its proper divisors (6470111810).

12605561998 is a wasteful number, since it uses less digits than its factorization.

12605561998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55776938.

The product of its (nonzero) digits is 1166400, while the sum is 52.

The spelling of 12605561998 in words is "twelve billion, six hundred five million, five hundred sixty-one thousand, nine hundred ninety-eight".