12391801198 has 24 divisors (see below), whose sum is σ = 21635684712. Its totient is φ = 5307516144.

The previous prime is 12391801187. The next prime is 12391801237. The reversal of 12391801198 is 89110819321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125440 + ... + 201292.

It is an arithmetic number, because the mean of its divisors is an integer number (901486863).

Almost surely, 2^12391801198 is an apocalyptic number.

12391801198 is a deficient number, since it is larger than the sum of its proper divisors (9243883514).

12391801198 is a wasteful number, since it uses less digits than its factorization.

12391801198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77536 (or 77529 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 43.

The spelling of 12391801198 in words is "twelve billion, three hundred ninety-one million, eight hundred one thousand, one hundred ninety-eight".