2640430489 has 2 divisors, whose sum is σ = 2640430490. Its totient is φ = 2640430488.

The previous prime is 2640430451. The next prime is 2640430571. The reversal of 2640430489 is 9840340462.

2640430489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2460656025 + 179774464 = 49605^2 + 13408^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640430489 - 2⁹ = 2640429977 is a prime.

It is not a weakly prime, because it can be changed into another prime (2640430439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320215244 + 1320215245.

It is an arithmetic number, because the mean of its divisors is an integer number (1320215245).

Almost surely, 2^2640430489 is an apocalyptic number.

It is an amenable number.

2640430489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640430489 is an equidigital number, since it uses as much as digits as its factorization.

2640430489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 2640430489 is about 51385.1193342976. The cubic root of 2640430489 is about 1382.1597646766.

The spelling of 2640430489 in words is "two billion, six hundred forty million, four hundred thirty thousand, four hundred eighty-nine".