77399552771 has 2 divisors, whose sum is σ = 77399552772. Its totient is φ = 77399552770.

The previous prime is 77399552767. The next prime is 77399552801. The reversal of 77399552771 is 17725599377.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77399552771 - 2² = 77399552767 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (77399552371) 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, 38699776385 + 38699776386.

It is an arithmetic number, because the mean of its divisors is an integer number (38699776386).

Almost surely, 2^77399552771 is an apocalyptic number.

77399552771 is a deficient number, since it is larger than the sum of its proper divisors (1).

77399552771 is an equidigital number, since it uses as much as digits as its factorization.

77399552771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29172150, while the sum is 62.

The spelling of 77399552771 in words is "seventy-seven billion, three hundred ninety-nine million, five hundred fifty-two thousand, seven hundred seventy-one".