12750291881 has 2 divisors, whose sum is σ = 12750291882. Its totient is φ = 12750291880.

The previous prime is 12750291863. The next prime is 12750291893. The reversal of 12750291881 is 18819205721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12748442281 + 1849600 = 112909^2 + 1360^2 .

It is a cyclic number.

It is not a de Polignac number, because 12750291881 - 2⁶ = 12750291817 is a prime.

It is a super-2 number, since 2×12750291881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12750291181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6375145940 + 6375145941.

It is an arithmetic number, because the mean of its divisors is an integer number (6375145941).

Almost surely, 2^12750291881 is an apocalyptic number.

It is an amenable number.

12750291881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12750291881 is an equidigital number, since it uses as much as digits as its factorization.

12750291881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 44.

The spelling of 12750291881 in words is "twelve billion, seven hundred fifty million, two hundred ninety-one thousand, eight hundred eighty-one".