78468417187613 has 2 divisors, whose sum is σ = 78468417187614. Its totient is φ = 78468417187612.

The previous prime is 78468417187609. The next prime is 78468417187759. The reversal of 78468417187613 is 31678171486487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68529952871524 + 9938464316089 = 8278282^2 + 3152533^2 .

It is an emirp because it is prime and its reverse (31678171486487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78468417187613 - 2² = 78468417187609 is a prime.

It is a super-3 number, since 3×78468417187613³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78468417187213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39234208593806 + 39234208593807.

It is an arithmetic number, because the mean of its divisors is an integer number (39234208593807).

Almost surely, 2^{78468417187613} is an apocalyptic number.

It is an amenable number.

78468417187613 is a deficient number, since it is larger than the sum of its proper divisors (1).

78468417187613 is an equidigital number, since it uses as much as digits as its factorization.

78468417187613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 303464448, while the sum is 71.

The spelling of 78468417187613 in words is "seventy-eight trillion, four hundred sixty-eight billion, four hundred seventeen million, one hundred eighty-seven thousand, six hundred thirteen".