12765025081 has 2 divisors, whose sum is σ = 12765025082. Its totient is φ = 12765025080.

The previous prime is 12765025067. The next prime is 12765025159. The reversal of 12765025081 is 18052056721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9386509456 + 3378515625 = 96884^2 + 58125^2 .

It is a cyclic number.

It is not a de Polignac number, because 12765025081 - 2⁷ = 12765024953 is a prime.

It is a super-2 number, since 2×12765025081² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12765025081.

It is not a weakly prime, because it can be changed into another prime (12765025681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6382512540 + 6382512541.

It is an arithmetic number, because the mean of its divisors is an integer number (6382512541).

Almost surely, 2^12765025081 is an apocalyptic number.

It is an amenable number.

12765025081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12765025081 is an equidigital number, since it uses as much as digits as its factorization.

12765025081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 12765025081 in words is "twelve billion, seven hundred sixty-five million, twenty-five thousand, eighty-one".