77325857249 has 2 divisors, whose sum is σ = 77325857250. Its totient is φ = 77325857248.

The previous prime is 77325857179. The next prime is 77325857299. The reversal of 77325857249 is 94275852377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67811805649 + 9514051600 = 260407^2 + 97540^2 .

It is a cyclic number.

It is not a de Polignac number, because 77325857249 - 2¹⁶ = 77325791713 is a prime.

It is not a weakly prime, because it can be changed into another prime (77325857299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38662928624 + 38662928625.

It is an arithmetic number, because the mean of its divisors is an integer number (38662928625).

Almost surely, 2^77325857249 is an apocalyptic number.

It is an amenable number.

77325857249 is a deficient number, since it is larger than the sum of its proper divisors (1).

77325857249 is an equidigital number, since it uses as much as digits as its factorization.

77325857249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29635200, while the sum is 59.

The spelling of 77325857249 in words is "seventy-seven billion, three hundred twenty-five million, eight hundred fifty-seven thousand, two hundred forty-nine".