2765320409 has 2 divisors, whose sum is σ = 2765320410. Its totient is φ = 2765320408.

The previous prime is 2765320357. The next prime is 2765320417. The reversal of 2765320409 is 9040235672.

2765320409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2090775625 + 674544784 = 45725^2 + 25972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2765320409 is a prime.

It is not a weakly prime, because it can be changed into another prime (2765320469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1382660204 + 1382660205.

It is an arithmetic number, because the mean of its divisors is an integer number (1382660205).

Almost surely, 2^2765320409 is an apocalyptic number.

It is an amenable number.

2765320409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2765320409 is an equidigital number, since it uses as much as digits as its factorization.

2765320409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 2765320409 is about 52586.3138943965. The cubic root of 2765320409 is about 1403.6165693007.

The spelling of 2765320409 in words is "two billion, seven hundred sixty-five million, three hundred twenty thousand, four hundred nine".