76776481803361 has 2 divisors, whose sum is σ = 76776481803362. Its totient is φ = 76776481803360.

The previous prime is 76776481803311. The next prime is 76776481803367. The reversal of 76776481803361 is 16330818467767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68764411889761 + 8012069913600 = 8292431^2 + 2830560^2 .

It is an emirp because it is prime and its reverse (16330818467767) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76776481803361 - 2¹⁹ = 76776481279073 is a prime.

It is not a weakly prime, because it can be changed into another prime (76776481803367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38388240901680 + 38388240901681.

It is an arithmetic number, because the mean of its divisors is an integer number (38388240901681).

Almost surely, 2^{76776481803361} is an apocalyptic number.

It is an amenable number.

76776481803361 is a deficient number, since it is larger than the sum of its proper divisors (1).

76776481803361 is an equidigital number, since it uses as much as digits as its factorization.

76776481803361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170698752, while the sum is 67.

The spelling of 76776481803361 in words is "seventy-six trillion, seven hundred seventy-six billion, four hundred eighty-one million, eight hundred three thousand, three hundred sixty-one".