12765017117 has 4 divisors (see below), whose sum is σ = 12769336956. Its totient is φ = 12760697280.

The previous prime is 12765017107. The next prime is 12765017119. The reversal of 12765017117 is 71171056721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71171056721 = 1489 ⋅47797889.

It can be written as a sum of positive squares in 2 ways, for example, as 2619290041 + 10145727076 = 51179^2 + 100726^2 .

It is a cyclic number.

It is not a de Polignac number, because 12765017117 - 2⁶ = 12765017053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12765017119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2155484 + ... + 2161397.

It is an arithmetic number, because the mean of its divisors is an integer number (3192334239).

Almost surely, 2^12765017117 is an apocalyptic number.

It is an amenable number.

12765017117 is a deficient number, since it is larger than the sum of its proper divisors (4319839).

12765017117 is an equidigital number, since it uses as much as digits as its factorization.

12765017117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4319838.

The product of its (nonzero) digits is 20580, while the sum is 38.

The spelling of 12765017117 in words is "twelve billion, seven hundred sixty-five million, seventeen thousand, one hundred seventeen".