78832831138517 has 2 divisors, whose sum is σ = 78832831138518. Its totient is φ = 78832831138516.

The previous prime is 78832831138493. The next prime is 78832831138597. The reversal of 78832831138517 is 71583113823887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76088792506321 + 2744038632196 = 8722889^2 + 1656514^2 .

It is a cyclic number.

It is not a de Polignac number, because 78832831138517 - 2²⁰ = 78832830089941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78832831138597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39416415569258 + 39416415569259.

It is an arithmetic number, because the mean of its divisors is an integer number (39416415569259).

Almost surely, 2^{78832831138517} is an apocalyptic number.

It is an amenable number.

78832831138517 is a deficient number, since it is larger than the sum of its proper divisors (1).

78832831138517 is an equidigital number, since it uses as much as digits as its factorization.

78832831138517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54190080, while the sum is 65.

The spelling of 78832831138517 in words is "seventy-eight trillion, eight hundred thirty-two billion, eight hundred thirty-one million, one hundred thirty-eight thousand, five hundred seventeen".