8077740509 has 2 divisors, whose sum is σ = 8077740510. Its totient is φ = 8077740508.

The previous prime is 8077740491. The next prime is 8077740521. The reversal of 8077740509 is 9050477708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7849428409 + 228312100 = 88597^2 + 15110^2 .

It is a cyclic number.

It is not a de Polignac number, because 8077740509 - 2¹⁶ = 8077674973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8077740569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4038870254 + 4038870255.

It is an arithmetic number, because the mean of its divisors is an integer number (4038870255).

Almost surely, 2^8077740509 is an apocalyptic number.

It is an amenable number.

8077740509 is a deficient number, since it is larger than the sum of its proper divisors (1).

8077740509 is an equidigital number, since it uses as much as digits as its factorization.

8077740509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 493920, while the sum is 47.

The square root of 8077740509 is about 89876.2510844773. The cubic root of 8077740509 is about 2006.4575036339.

The spelling of 8077740509 in words is "eight billion, seventy-seven million, seven hundred forty thousand, five hundred nine".