12865232078761 has 8 divisors (see below), whose sum is σ = 12927338043048. Its totient is φ = 12803198208000.

The previous prime is 12865232078749. The next prime is 12865232078807. The reversal of 12865232078761 is 16787023256821.

It can be written as a sum of positive squares in 4 ways, for example, as 7013259841536 + 5851972237225 = 2648256^2 + 2419085^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12865232078761 - 2⁹ = 12865232078249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12865232078696 and 12865232078705.

It is not an unprimeable number, because it can be changed into a prime (12865232978761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17665600 + ... + 18379441.

It is an arithmetic number, because the mean of its divisors is an integer number (1615917255381).

Almost surely, 2^{12865232078761} is an apocalyptic number.

It is an amenable number.

12865232078761 is a deficient number, since it is larger than the sum of its proper divisors (62105964287).

12865232078761 is a wasteful number, since it uses less digits than its factorization.

12865232078761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36046763.

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 12865232078761 in words is "twelve trillion, eight hundred sixty-five billion, two hundred thirty-two million, seventy-eight thousand, seven hundred sixty-one".