12581036953 has 2 divisors, whose sum is σ = 12581036954. Its totient is φ = 12581036952.

The previous prime is 12581036929. The next prime is 12581036959. The reversal of 12581036953 is 35963018521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11731489344 + 849547609 = 108312^2 + 29147^2 .

It is a cyclic number.

It is not a de Polignac number, because 12581036953 - 2⁹ = 12581036441 is a prime.

It is not a weakly prime, because it can be changed into another prime (12581036959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6290518476 + 6290518477.

It is an arithmetic number, because the mean of its divisors is an integer number (6290518477).

Almost surely, 2^12581036953 is an apocalyptic number.

It is an amenable number.

12581036953 is a deficient number, since it is larger than the sum of its proper divisors (1).

12581036953 is an equidigital number, since it uses as much as digits as its factorization.

12581036953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 12581036953 in words is "twelve billion, five hundred eighty-one million, thirty-six thousand, nine hundred fifty-three".