77804163751313 has 2 divisors, whose sum is σ = 77804163751314. Its totient is φ = 77804163751312.

The previous prime is 77804163751247. The next prime is 77804163751339. The reversal of 77804163751313 is 31315736140877.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75234320707984 + 2569843043329 = 8673772^2 + 1603073^2 .

It is a cyclic number.

It is not a de Polignac number, because 77804163751313 - 2⁸ = 77804163751057 is a prime.

It is a super-2 number, since 2×77804163751313² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77804163751343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38902081875656 + 38902081875657.

It is an arithmetic number, because the mean of its divisors is an integer number (38902081875657).

Almost surely, 2^{77804163751313} is an apocalyptic number.

It is an amenable number.

77804163751313 is a deficient number, since it is larger than the sum of its proper divisors (1).

77804163751313 is an equidigital number, since it uses as much as digits as its factorization.

77804163751313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8890560, while the sum is 56.

The spelling of 77804163751313 in words is "seventy-seven trillion, eight hundred four billion, one hundred sixty-three million, seven hundred fifty-one thousand, three hundred thirteen".