12538103761 has 2 divisors, whose sum is σ = 12538103762. Its totient is φ = 12538103760.

The previous prime is 12538103749. The next prime is 12538103771. The reversal of 12538103761 is 16730183521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12400158736 + 137945025 = 111356^2 + 11745^2 .

It is an emirp because it is prime and its reverse (16730183521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12538103761 - 2²³ = 12529715153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12538103761.

It is not a weakly prime, because it can be changed into another prime (12538103731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6269051880 + 6269051881.

It is an arithmetic number, because the mean of its divisors is an integer number (6269051881).

Almost surely, 2^12538103761 is an apocalyptic number.

It is an amenable number.

12538103761 is a deficient number, since it is larger than the sum of its proper divisors (1).

12538103761 is an equidigital number, since it uses as much as digits as its factorization.

12538103761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 12538103761 in words is "twelve billion, five hundred thirty-eight million, one hundred three thousand, seven hundred sixty-one".