77767818864611 has 2 divisors, whose sum is σ = 77767818864612. Its totient is φ = 77767818864610.

The previous prime is 77767818864529. The next prime is 77767818864613. The reversal of 77767818864611 is 11646881876777.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77767818864611 - 2²² = 77767814670307 is a prime.

Together with 77767818864613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77767818864613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38883909432305 + 38883909432306.

It is an arithmetic number, because the mean of its divisors is an integer number (38883909432306).

Almost surely, 2^{77767818864611} is an apocalyptic number.

77767818864611 is a deficient number, since it is larger than the sum of its proper divisors (1).

77767818864611 is an equidigital number, since it uses as much as digits as its factorization.

77767818864611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1062125568, while the sum is 77.

The spelling of 77767818864611 in words is "seventy-seven trillion, seven hundred sixty-seven billion, eight hundred eighteen million, eight hundred sixty-four thousand, six hundred eleven".