12834578215117 has 2 divisors, whose sum is σ = 12834578215118. Its totient is φ = 12834578215116.

The previous prime is 12834578215073. The next prime is 12834578215181. The reversal of 12834578215117 is 71151287543821.

It is a happy number.

12834578215117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10910112878116 + 1924465337001 = 3303046^2 + 1387251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12834578215117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12834578215517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6417289107558 + 6417289107559.

It is an arithmetic number, because the mean of its divisors is an integer number (6417289107559).

Almost surely, 2^{12834578215117} is an apocalyptic number.

It is an amenable number.

12834578215117 is a deficient number, since it is larger than the sum of its proper divisors (1).

12834578215117 is an equidigital number, since it uses as much as digits as its factorization.

12834578215117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3763200, while the sum is 55.

The spelling of 12834578215117 in words is "twelve trillion, eight hundred thirty-four billion, five hundred seventy-eight million, two hundred fifteen thousand, one hundred seventeen".