77683313887 has 2 divisors, whose sum is σ = 77683313888. Its totient is φ = 77683313886.

The previous prime is 77683313879. The next prime is 77683313963. The reversal of 77683313887 is 78831338677.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77683313887 - 2³ = 77683313879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77683313087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38841656943 + 38841656944.

It is an arithmetic number, because the mean of its divisors is an integer number (38841656944).

Almost surely, 2^77683313887 is an apocalyptic number.

77683313887 is a deficient number, since it is larger than the sum of its proper divisors (1).

77683313887 is an equidigital number, since it uses as much as digits as its factorization.

77683313887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28449792, while the sum is 61.

The spelling of 77683313887 in words is "seventy-seven billion, six hundred eighty-three million, three hundred thirteen thousand, eight hundred eighty-seven".