6546461639 has 2 divisors, whose sum is σ = 6546461640. Its totient is φ = 6546461638.

The previous prime is 6546461633. The next prime is 6546461671. The reversal of 6546461639 is 9361646456.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6546461639 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6546461633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3273230819 + 3273230820.

It is an arithmetic number, because the mean of its divisors is an integer number (3273230820).

Almost surely, 2^6546461639 is an apocalyptic number.

6546461639 is a deficient number, since it is larger than the sum of its proper divisors (1).

6546461639 is an equidigital number, since it uses as much as digits as its factorization.

6546461639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 50.

The square root of 6546461639 is about 80910.2072608889. The cubic root of 6546461639 is about 1870.6916559346.

The spelling of 6546461639 in words is "six billion, five hundred forty-six million, four hundred sixty-one thousand, six hundred thirty-nine".