12643049998 has 16 divisors (see below), whose sum is σ = 20323965600. Its totient is φ = 5883251616.

The previous prime is 12643049987. The next prime is 12643050001. The reversal of 12643049998 is 89994034621.

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, 3712473 + ... + 3715876.

It is an arithmetic number, because the mean of its divisors is an integer number (1270247850).

Almost surely, 2^12643049998 is an apocalyptic number.

12643049998 is a deficient number, since it is larger than the sum of its proper divisors (7680915602).

12643049998 is a wasteful number, since it uses less digits than its factorization.

12643049998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428411.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 12643049998 in words is "twelve billion, six hundred forty-three million, forty-nine thousand, nine hundred ninety-eight".