77265252217 has 2 divisors, whose sum is σ = 77265252218. Its totient is φ = 77265252216.

The previous prime is 77265252187. The next prime is 77265252287. The reversal of 77265252217 is 71225256277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61001096256 + 16264155961 = 246984^2 + 127531^2 .

It is a cyclic number.

It is not a de Polignac number, because 77265252217 - 2⁷ = 77265252089 is a prime.

It is not a weakly prime, because it can be changed into another prime (77265252287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38632626108 + 38632626109.

It is an arithmetic number, because the mean of its divisors is an integer number (38632626109).

Almost surely, 2^77265252217 is an apocalyptic number.

It is an amenable number.

77265252217 is a deficient number, since it is larger than the sum of its proper divisors (1).

77265252217 is an equidigital number, since it uses as much as digits as its factorization.

77265252217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 823200, while the sum is 46.

The spelling of 77265252217 in words is "seventy-seven billion, two hundred sixty-five million, two hundred fifty-two thousand, two hundred seventeen".