77214525517 has 2 divisors, whose sum is σ = 77214525518. Its totient is φ = 77214525516.

The previous prime is 77214525499. The next prime is 77214525523. The reversal of 77214525517 is 71552541277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69722930601 + 7491594916 = 264051^2 + 86554^2 .

It is a cyclic number.

It is not a de Polignac number, because 77214525517 - 2³¹ = 75067041869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77214525547) 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, 38607262758 + 38607262759.

It is an arithmetic number, because the mean of its divisors is an integer number (38607262759).

Almost surely, 2^77214525517 is an apocalyptic number.

It is an amenable number.

77214525517 is a deficient number, since it is larger than the sum of its proper divisors (1).

77214525517 is an equidigital number, since it uses as much as digits as its factorization.

77214525517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 686000, while the sum is 46.

The spelling of 77214525517 in words is "seventy-seven billion, two hundred fourteen million, five hundred twenty-five thousand, five hundred seventeen".