77967795251 has 2 divisors, whose sum is σ = 77967795252. Its totient is φ = 77967795250.

The previous prime is 77967795209. The next prime is 77967795253. The reversal of 77967795251 is 15259776977.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77967795251 - 2¹⁸ = 77967533107 is a prime.

Together with 77967795253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77967795253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38983897625 + 38983897626.

It is an arithmetic number, because the mean of its divisors is an integer number (38983897626).

Almost surely, 2^77967795251 is an apocalyptic number.

77967795251 is a deficient number, since it is larger than the sum of its proper divisors (1).

77967795251 is an equidigital number, since it uses as much as digits as its factorization.

77967795251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58344300, while the sum is 65.

The spelling of 77967795251 in words is "seventy-seven billion, nine hundred sixty-seven million, seven hundred ninety-five thousand, two hundred fifty-one".