12542067757 has 2 divisors, whose sum is σ = 12542067758. Its totient is φ = 12542067756.

The previous prime is 12542067749. The next prime is 12542067821. The reversal of 12542067757 is 75776024521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10813088196 + 1728979561 = 103986^2 + 41581^2 .

It is a cyclic number.

It is not a de Polignac number, because 12542067757 - 2³ = 12542067749 is a prime.

It is a super-2 number, since 2×12542067757² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12542067737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271033878 + 6271033879.

It is an arithmetic number, because the mean of its divisors is an integer number (6271033879).

Almost surely, 2^12542067757 is an apocalyptic number.

It is an amenable number.

12542067757 is a deficient number, since it is larger than the sum of its proper divisors (1).

12542067757 is an equidigital number, since it uses as much as digits as its factorization.

12542067757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 823200, while the sum is 46.

The spelling of 12542067757 in words is "twelve billion, five hundred forty-two million, sixty-seven thousand, seven hundred fifty-seven".