12750138891 has 48 divisors (see below), whose sum is σ = 21706513920. Its totient is φ = 7061281920.

The previous prime is 12750138883. The next prime is 12750138967. The reversal of 12750138891 is 19883105721.

12750138891 is a `hidden beast` number, since 1 + 27 + 501 + 38 + 8 + 91 = 666.

It is not a de Polignac number, because 12750138891 - 2³ = 12750138883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12750138881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 239751 + ... + 288063.

It is an arithmetic number, because the mean of its divisors is an integer number (452219040).

Almost surely, 2^12750138891 is an apocalyptic number.

12750138891 is a deficient number, since it is larger than the sum of its proper divisors (8956375029).

12750138891 is a wasteful number, since it uses less digits than its factorization.

12750138891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48456 (or 48453 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 12750138891 in words is "twelve billion, seven hundred fifty million, one hundred thirty-eight thousand, eight hundred ninety-one".