7997520092777 has 2 divisors, whose sum is σ = 7997520092778. Its totient is φ = 7997520092776.

The previous prime is 7997520092773. The next prime is 7997520092873. The reversal of 7997520092777 is 7772900257997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5275561265881 + 2721958826896 = 2296859^2 + 1649836^2 .

It is a cyclic number.

It is not a de Polignac number, because 7997520092777 - 2² = 7997520092773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7997520092777.

It is not a weakly prime, because it can be changed into another prime (7997520092773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3998760046388 + 3998760046389.

It is an arithmetic number, because the mean of its divisors is an integer number (3998760046389).

Almost surely, 2^{7997520092777} is an apocalyptic number.

It is an amenable number.

7997520092777 is a deficient number, since it is larger than the sum of its proper divisors (1).

7997520092777 is an equidigital number, since it uses as much as digits as its factorization.

7997520092777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 245046060, while the sum is 71.

The spelling of 7997520092777 in words is "seven trillion, nine hundred ninety-seven billion, five hundred twenty million, ninety-two thousand, seven hundred seventy-seven".