6447436159 has 2 divisors, whose sum is σ = 6447436160. Its totient is φ = 6447436158.

The previous prime is 6447436111. The next prime is 6447436169. The reversal of 6447436159 is 9516347446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6447436159 - 2¹¹ = 6447434111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6447436109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3223718079 + 3223718080.

It is an arithmetic number, because the mean of its divisors is an integer number (3223718080).

Almost surely, 2^6447436159 is an apocalyptic number.

6447436159 is a deficient number, since it is larger than the sum of its proper divisors (1).

6447436159 is an equidigital number, since it uses as much as digits as its factorization.

6447436159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 49.

The square root of 6447436159 is about 80295.9286576848. The cubic root of 6447436159 is about 1861.2113124650.

The spelling of 6447436159 in words is "six billion, four hundred forty-seven million, four hundred thirty-six thousand, one hundred fifty-nine".