77781047114423 has 2 divisors, whose sum is σ = 77781047114424. Its totient is φ = 77781047114422.

The previous prime is 77781047114389. The next prime is 77781047114467. The reversal of 77781047114423 is 32441174018777.

It is a weak prime.

It is an emirp because it is prime and its reverse (32441174018777) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77781047114423 - 2⁴⁴ = 60188861070007 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77781047114483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38890523557211 + 38890523557212.

It is an arithmetic number, because the mean of its divisors is an integer number (38890523557212).

Almost surely, 2^{77781047114423} is an apocalyptic number.

77781047114423 is a deficient number, since it is larger than the sum of its proper divisors (1).

77781047114423 is an equidigital number, since it uses as much as digits as its factorization.

77781047114423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7375872, while the sum is 56.

The spelling of 77781047114423 in words is "seventy-seven trillion, seven hundred eighty-one billion, forty-seven million, one hundred fourteen thousand, four hundred twenty-three".