12881557973 has 2 divisors, whose sum is σ = 12881557974. Its totient is φ = 12881557972.

The previous prime is 12881557957. The next prime is 12881557991. The reversal of 12881557973 is 37975518821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10196556484 + 2685001489 = 100978^2 + 51817^2 .

It is a cyclic number.

It is not a de Polignac number, because 12881557973 - 2⁴ = 12881557957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12881557933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6440778986 + 6440778987.

It is an arithmetic number, because the mean of its divisors is an integer number (6440778987).

Almost surely, 2^12881557973 is an apocalyptic number.

It is an amenable number.

12881557973 is a deficient number, since it is larger than the sum of its proper divisors (1).

12881557973 is an equidigital number, since it uses as much as digits as its factorization.

12881557973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600, while the sum is 56.

The spelling of 12881557973 in words is "twelve billion, eight hundred eighty-one million, five hundred fifty-seven thousand, nine hundred seventy-three".