12928556692 has 6 divisors (see below), whose sum is σ = 22624974218. Its totient is φ = 6464278344.

The previous prime is 12928556677. The next prime is 12928556717. The reversal of 12928556692 is 29665582921.

It can be written as a sum of positive squares in only one way, i.e., 11002751236 + 1925805456 = 104894^2 + 43884^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1616069583 + ... + 1616069590.

Almost surely, 2^12928556692 is an apocalyptic number.

It is an amenable number.

12928556692 is a deficient number, since it is larger than the sum of its proper divisors (9696417526).

12928556692 is a wasteful number, since it uses less digits than its factorization.

12928556692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232139177 (or 3232139175 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 55.

The spelling of 12928556692 in words is "twelve billion, nine hundred twenty-eight million, five hundred fifty-six thousand, six hundred ninety-two".