77287855297 has 2 divisors, whose sum is σ = 77287855298. Its totient is φ = 77287855296.

The previous prime is 77287855289. The next prime is 77287855301. The reversal of 77287855297 is 79255878277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77052877056 + 234978241 = 277584^2 + 15329^2 .

It is a cyclic number.

It is not a de Polignac number, because 77287855297 - 2³ = 77287855289 is a prime.

It is not a weakly prime, because it can be changed into another prime (77287855217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38643927648 + 38643927649.

It is an arithmetic number, because the mean of its divisors is an integer number (38643927649).

Almost surely, 2^77287855297 is an apocalyptic number.

It is an amenable number.

77287855297 is a deficient number, since it is larger than the sum of its proper divisors (1).

77287855297 is an equidigital number, since it uses as much as digits as its factorization.

77287855297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138297600, while the sum is 67.

The spelling of 77287855297 in words is "seventy-seven billion, two hundred eighty-seven million, eight hundred fifty-five thousand, two hundred ninety-seven".