77391901127 has 2 divisors, whose sum is σ = 77391901128. Its totient is φ = 77391901126.

The previous prime is 77391901121. The next prime is 77391901129. The reversal of 77391901127 is 72110919377.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77391901127 - 2¹² = 77391897031 is a prime.

Together with 77391901129, 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 (77391901121) 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, 38695950563 + 38695950564.

It is an arithmetic number, because the mean of its divisors is an integer number (38695950564).

Almost surely, 2^77391901127 is an apocalyptic number.

77391901127 is a deficient number, since it is larger than the sum of its proper divisors (1).

77391901127 is an equidigital number, since it uses as much as digits as its factorization.

77391901127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 166698, while the sum is 47.

The spelling of 77391901127 in words is "seventy-seven billion, three hundred ninety-one million, nine hundred one thousand, one hundred twenty-seven".