6729943651 has 2 divisors, whose sum is σ = 6729943652. Its totient is φ = 6729943650.

The previous prime is 6729943601. The next prime is 6729943673. The reversal of 6729943651 is 1563499276.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6729943651 is a prime.

It is not a weakly prime, because it can be changed into another prime (6729943601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3364971825 + 3364971826.

It is an arithmetic number, because the mean of its divisors is an integer number (3364971826).

Almost surely, 2^6729943651 is an apocalyptic number.

6729943651 is a deficient number, since it is larger than the sum of its proper divisors (1).

6729943651 is an equidigital number, since it uses as much as digits as its factorization.

6729943651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 52.

The square root of 6729943651 is about 82036.2337689877. The cubic root of 6729943651 is about 1888.0079092534.

The spelling of 6729943651 in words is "six billion, seven hundred twenty-nine million, nine hundred forty-three thousand, six hundred fifty-one".