7878815462213 has 2 divisors, whose sum is σ = 7878815462214. Its totient is φ = 7878815462212.

The previous prime is 7878815462197. The next prime is 7878815462227. The reversal of 7878815462213 is 3122645188787.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7191718700644 + 687096761569 = 2681738^2 + 828913^2 .

It is a cyclic number.

It is not a de Polignac number, because 7878815462213 - 2⁴ = 7878815462197 is a prime.

It is a super-3 number, since 3×7878815462213³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7878815462233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3939407731106 + 3939407731107.

It is an arithmetic number, because the mean of its divisors is an integer number (3939407731107).

Almost surely, 2^{7878815462213} is an apocalyptic number.

It is an amenable number.

7878815462213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7878815462213 is an equidigital number, since it uses as much as digits as its factorization.

7878815462213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36126720, while the sum is 62.

The spelling of 7878815462213 in words is "seven trillion, eight hundred seventy-eight billion, eight hundred fifteen million, four hundred sixty-two thousand, two hundred thirteen".