6413664281 has 2 divisors, whose sum is σ = 6413664282. Its totient is φ = 6413664280.

The previous prime is 6413664251. The next prime is 6413664353. The reversal of 6413664281 is 1824663146.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5697834256 + 715830025 = 75484^2 + 26755^2 .

It is a cyclic number.

It is not a de Polignac number, because 6413664281 - 2¹⁰ = 6413663257 is a prime.

It is a super-2 number, since 2×6413664281² = 82270179018750493922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6413664221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3206832140 + 3206832141.

It is an arithmetic number, because the mean of its divisors is an integer number (3206832141).

Almost surely, 2^6413664281 is an apocalyptic number.

It is an amenable number.

6413664281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6413664281 is an equidigital number, since it uses as much as digits as its factorization.

6413664281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 41.

The square root of 6413664281 is about 80085.3562207224. The cubic root of 6413664281 is about 1857.9559269850.

The spelling of 6413664281 in words is "six billion, four hundred thirteen million, six hundred sixty-four thousand, two hundred eighty-one".