12781973929292 has 24 divisors (see below), whose sum is σ = 22437804985344. Its totient is φ = 6371203110272.

The previous prime is 12781973929267. The next prime is 12781973929391. The reversal of 12781973929292 is 29292937918721.

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 7 ways as a sum of consecutive naturals, for example, 2154188 + ... + 5495859.

It is an arithmetic number, because the mean of its divisors is an integer number (934908541056).

Almost surely, 2^{12781973929292} is an apocalyptic number.

It is an amenable number.

12781973929292 is a deficient number, since it is larger than the sum of its proper divisors (9655831056052).

12781973929292 is a wasteful number, since it uses less digits than its factorization.

12781973929292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7651345 (or 7651343 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 71.

The spelling of 12781973929292 in words is "twelve trillion, seven hundred eighty-one billion, nine hundred seventy-three million, nine hundred twenty-nine thousand, two hundred ninety-two".