12398779676 has 12 divisors (see below), whose sum is σ = 21710254272. Its totient is φ = 6195849888.

The previous prime is 12398779639. The next prime is 12398779693. The reversal of 12398779676 is 67697789321.

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, 877100 + ... + 891123.

It is an arithmetic number, because the mean of its divisors is an integer number (1809187856).

Almost surely, 2^12398779676 is an apocalyptic number.

It is an amenable number.

12398779676 is a deficient number, since it is larger than the sum of its proper divisors (9311474596).

12398779676 is a wasteful number, since it uses less digits than its factorization.

12398779676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769980 (or 1769978 counting only the distinct ones).

The product of its digits is 48009024, while the sum is 65.

The spelling of 12398779676 in words is "twelve billion, three hundred ninety-eight million, seven hundred seventy-nine thousand, six hundred seventy-six".