12938728666764 has 48 divisors (see below), whose sum is σ = 31035492578048. Its totient is φ = 4192396636608.

The previous prime is 12938728666651. The next prime is 12938728666769. The reversal of 12938728666764 is 46766682783921.

It is not an unprimeable number, because it can be changed into a prime (12938728666769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13235122 + ... + 14179065.

Almost surely, 2^{12938728666764} is an apocalyptic number.

It is an amenable number.

12938728666764 is an abundant number, since it is smaller than the sum of its proper divisors (18096763911284).

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

12938728666764 is a wasteful number, since it uses less digits than its factorization.

12938728666764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27415294 (or 27415292 counting only the distinct ones).

The product of its digits is 1755758592, while the sum is 75.

The spelling of 12938728666764 in words is "twelve trillion, nine hundred thirty-eight billion, seven hundred twenty-eight million, six hundred sixty-six thousand, seven hundred sixty-four".