6459780539 has 2 divisors, whose sum is σ = 6459780540. Its totient is φ = 6459780538.

The previous prime is 6459780521. The next prime is 6459780563. The reversal of 6459780539 is 9350879546.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6459780539 is a prime.

It is a super-2 number, since 2×6459780539² = 83457529224086261042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6459780599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3229890269 + 3229890270.

It is an arithmetic number, because the mean of its divisors is an integer number (3229890270).

Almost surely, 2^6459780539 is an apocalyptic number.

6459780539 is a deficient number, since it is larger than the sum of its proper divisors (1).

6459780539 is an equidigital number, since it uses as much as digits as its factorization.

6459780539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8164800, while the sum is 56.

The square root of 6459780539 is about 80372.7599314594. The cubic root of 6459780539 is about 1862.3983916702.

The spelling of 6459780539 in words is "six billion, four hundred fifty-nine million, seven hundred eighty thousand, five hundred thirty-nine".