12938728666650 has 24 divisors (see below), whose sum is σ = 32088047093664. Its totient is φ = 3450327644400.

The previous prime is 12938728666649. The next prime is 12938728666651. The reversal of 12938728666650 is 5666682783921.

It is an interprime number because it is at equal distance from previous prime (12938728666649) and next prime (12938728666651).

It is not an unprimeable number, because it can be changed into a prime (12938728666651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43129095406 + ... + 43129095705.

It is an arithmetic number, because the mean of its divisors is an integer number (1337001962236).

Almost surely, 2^{12938728666650} is an apocalyptic number.

12938728666650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12938728666650 is an abundant number, since it is smaller than the sum of its proper divisors (19149318427014).

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

12938728666650 is a wasteful number, since it uses less digits than its factorization.

12938728666650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86258191126 (or 86258191121 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 69.

The spelling of 12938728666650 in words is "twelve trillion, nine hundred thirty-eight billion, seven hundred twenty-eight million, six hundred sixty-six thousand, six hundred fifty".