77381685299 has 2 divisors, whose sum is σ = 77381685300. Its totient is φ = 77381685298.

The previous prime is 77381685287. The next prime is 77381685373. The reversal of 77381685299 is 99258618377.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77381685299 - 2²⁴ = 77364908083 is a prime.

It is not a weakly prime, because it can be changed into another prime (77381685239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38690842649 + 38690842650.

It is an arithmetic number, because the mean of its divisors is an integer number (38690842650).

Almost surely, 2^77381685299 is an apocalyptic number.

77381685299 is a deficient number, since it is larger than the sum of its proper divisors (1).

77381685299 is an equidigital number, since it uses as much as digits as its factorization.

77381685299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45722880, while the sum is 65.

The spelling of 77381685299 in words is "seventy-seven billion, three hundred eighty-one million, six hundred eighty-five thousand, two hundred ninety-nine".