77233766497 has 2 divisors, whose sum is σ = 77233766498. Its totient is φ = 77233766496.

The previous prime is 77233766377. The next prime is 77233766503. The reversal of 77233766497 is 79466733277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54598864896 + 22634901601 = 233664^2 + 150449^2 .

It is a cyclic number.

It is not a de Polignac number, because 77233766497 - 2³¹ = 75086282849 is a prime.

It is not a weakly prime, because it can be changed into another prime (77233764497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38616883248 + 38616883249.

It is an arithmetic number, because the mean of its divisors is an integer number (38616883249).

Almost surely, 2^77233766497 is an apocalyptic number.

It is an amenable number.

77233766497 is a deficient number, since it is larger than the sum of its proper divisors (1).

77233766497 is an equidigital number, since it uses as much as digits as its factorization.

77233766497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56010528, while the sum is 61.

The spelling of 77233766497 in words is "seventy-seven billion, two hundred thirty-three million, seven hundred sixty-six thousand, four hundred ninety-seven".