77480871749 has 2 divisors, whose sum is σ = 77480871750. Its totient is φ = 77480871748.

The previous prime is 77480871733. The next prime is 77480871823. The reversal of 77480871749 is 94717808477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77425845025 + 55026724 = 278255^2 + 7418^2 .

It is an emirp because it is prime and its reverse (94717808477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77480871749 - 2⁴ = 77480871733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77480871691 and 77480871700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77480871449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38740435874 + 38740435875.

It is an arithmetic number, because the mean of its divisors is an integer number (38740435875).

Almost surely, 2^77480871749 is an apocalyptic number.

It is an amenable number.

77480871749 is a deficient number, since it is larger than the sum of its proper divisors (1).

77480871749 is an equidigital number, since it uses as much as digits as its factorization.

77480871749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22127616, while the sum is 62.

The spelling of 77480871749 in words is "seventy-seven billion, four hundred eighty million, eight hundred seventy-one thousand, seven hundred forty-nine".