12005136457 has 2 divisors, whose sum is σ = 12005136458. Its totient is φ = 12005136456.

The previous prime is 12005136427. The next prime is 12005136509. The reversal of 12005136457 is 75463150021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11022690121 + 982446336 = 104989^2 + 31344^2 .

It is a cyclic number.

It is not a de Polignac number, because 12005136457 - 2³¹ = 9857652809 is a prime.

It is not a weakly prime, because it can be changed into another prime (12005136427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6002568228 + 6002568229.

It is an arithmetic number, because the mean of its divisors is an integer number (6002568229).

Almost surely, 2^12005136457 is an apocalyptic number.

It is an amenable number.

12005136457 is a deficient number, since it is larger than the sum of its proper divisors (1).

12005136457 is an equidigital number, since it uses as much as digits as its factorization.

12005136457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

Adding to 12005136457 its reverse (75463150021), we get a palindrome (87468286478).

The spelling of 12005136457 in words is "twelve billion, five million, one hundred thirty-six thousand, four hundred fifty-seven".