12897673928 has 8 divisors (see below), whose sum is σ = 24183138630. Its totient is φ = 6448836960.

The previous prime is 12897673903. The next prime is 12897673931. The reversal of 12897673928 is 82937679821.

It can be written as a sum of positive squares in only one way, i.e., 9169594564 + 3728079364 = 95758^2 + 61058^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806104613 + ... + 806104628.

Almost surely, 2^12897673928 is an apocalyptic number.

It is an amenable number.

12897673928 is a deficient number, since it is larger than the sum of its proper divisors (11285464702).

12897673928 is a wasteful number, since it uses less digits than its factorization.

12897673928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612209247 (or 1612209243 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 62.

The spelling of 12897673928 in words is "twelve billion, eight hundred ninety-seven million, six hundred seventy-three thousand, nine hundred twenty-eight".