77957694671 has 2 divisors, whose sum is σ = 77957694672. Its totient is φ = 77957694670.

The previous prime is 77957694653. The next prime is 77957694673. The reversal of 77957694671 is 17649675977.

It is a strong prime.

It is an emirp because it is prime and its reverse (17649675977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77957694671 - 2¹⁰ = 77957693647 is a prime.

Together with 77957694673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77957694673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38978847335 + 38978847336.

It is an arithmetic number, because the mean of its divisors is an integer number (38978847336).

Almost surely, 2^77957694671 is an apocalyptic number.

77957694671 is a deficient number, since it is larger than the sum of its proper divisors (1).

77957694671 is an equidigital number, since it uses as much as digits as its factorization.

77957694671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 140026320, while the sum is 68.

The spelling of 77957694671 in words is "seventy-seven billion, nine hundred fifty-seven million, six hundred ninety-four thousand, six hundred seventy-one".