77211783348239 has 2 divisors, whose sum is σ = 77211783348240. Its totient is φ = 77211783348238.

The previous prime is 77211783348199. The next prime is 77211783348241. The reversal of 77211783348239 is 93284338711277.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77211783348239 is a prime.

It is a super-2 number, since 2×77211783348239² (a number of 29 digits) contains 22 as substring.

Together with 77211783348241, 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 (77211773348239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38605891674119 + 38605891674120.

It is an arithmetic number, because the mean of its divisors is an integer number (38605891674120).

Almost surely, 2^{77211783348239} is an apocalyptic number.

77211783348239 is a deficient number, since it is larger than the sum of its proper divisors (1).

77211783348239 is an equidigital number, since it uses as much as digits as its factorization.

77211783348239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85349376, while the sum is 65.

The spelling of 77211783348239 in words is "seventy-seven trillion, two hundred eleven billion, seven hundred eighty-three million, three hundred forty-eight thousand, two hundred thirty-nine".