12738695028 has 12 divisors (see below), whose sum is σ = 29723621760. Its totient is φ = 4246231672.

The previous prime is 12738694979. The next prime is 12738695083. The reversal of 12738695028 is 82059683721.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 530778948 + ... + 530778971.

It is an arithmetic number, because the mean of its divisors is an integer number (2476968480).

Almost surely, 2^12738695028 is an apocalyptic number.

It is an amenable number.

12738695028 is an abundant number, since it is smaller than the sum of its proper divisors (16984926732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12738695028 is a wasteful number, since it uses less digits than its factorization.

12738695028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061557926 (or 1061557924 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 12738695028 in words is "twelve billion, seven hundred thirty-eight million, six hundred ninety-five thousand, twenty-eight".