8405679484777 has 2 divisors, whose sum is σ = 8405679484778. Its totient is φ = 8405679484776.

The previous prime is 8405679484757. The next prime is 8405679484883. The reversal of 8405679484777 is 7774849765048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4583298666496 + 3822380818281 = 2140864^2 + 1955091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8405679484777 is a prime.

It is not a weakly prime, because it can be changed into another prime (8405679484717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4202839742388 + 4202839742389.

It is an arithmetic number, because the mean of its divisors is an integer number (4202839742389).

Almost surely, 2^{8405679484777} is an apocalyptic number.

It is an amenable number.

8405679484777 is a deficient number, since it is larger than the sum of its proper divisors (1).

8405679484777 is an equidigital number, since it uses as much as digits as its factorization.

8405679484777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2655313920, while the sum is 76.

The spelling of 8405679484777 in words is "eight trillion, four hundred five billion, six hundred seventy-nine million, four hundred eighty-four thousand, seven hundred seventy-seven".