12638768734 has 8 divisors (see below), whose sum is σ = 19001339280. Its totient is φ = 6304988976.

The previous prime is 12638768689. The next prime is 12638768741. The reversal of 12638768734 is 43786783621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12638768734² (a number of 21 digits) contains 22 as substring.

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, 7196599 + ... + 7198354.

It is an arithmetic number, because the mean of its divisors is an integer number (2375167410).

Almost surely, 2^12638768734 is an apocalyptic number.

12638768734 is a deficient number, since it is larger than the sum of its proper divisors (6362570546).

12638768734 is a wasteful number, since it uses less digits than its factorization.

12638768734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14395394.

The product of its digits is 8128512, while the sum is 55.

The spelling of 12638768734 in words is "twelve billion, six hundred thirty-eight million, seven hundred sixty-eight thousand, seven hundred thirty-four".