7878592732513 has 2 divisors, whose sum is σ = 7878592732514. Its totient is φ = 7878592732512.

The previous prime is 7878592732511. The next prime is 7878592732523. The reversal of 7878592732513 is 3152372958787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5301566115169 + 2577026617344 = 2302513^2 + 1605312^2 .

It is a cyclic number.

It is not a de Polignac number, because 7878592732513 - 2¹ = 7878592732511 is a prime.

Together with 7878592732511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7878592732511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3939296366256 + 3939296366257.

It is an arithmetic number, because the mean of its divisors is an integer number (3939296366257).

Almost surely, 2^{7878592732513} is an apocalyptic number.

It is an amenable number.

7878592732513 is a deficient number, since it is larger than the sum of its proper divisors (1).

7878592732513 is an equidigital number, since it uses as much as digits as its factorization.

7878592732513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 177811200, while the sum is 67.

The spelling of 7878592732513 in words is "seven trillion, eight hundred seventy-eight billion, five hundred ninety-two million, seven hundred thirty-two thousand, five hundred thirteen".