6245664281 has 2 divisors, whose sum is σ = 6245664282. Its totient is φ = 6245664280.

The previous prime is 6245664259. The next prime is 6245664307. The reversal of 6245664281 is 1824665426.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6222054400 + 23609881 = 78880^2 + 4859^2 .

It is a cyclic number.

It is not a de Polignac number, because 6245664281 - 2²² = 6241469977 is a prime.

It is a super-2 number, since 2×6245664281² = 78016644621918493922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6245661281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3122832140 + 3122832141.

It is an arithmetic number, because the mean of its divisors is an integer number (3122832141).

Almost surely, 2^6245664281 is an apocalyptic number.

It is an amenable number.

6245664281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6245664281 is an equidigital number, since it uses as much as digits as its factorization.

6245664281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 44.

The square root of 6245664281 is about 79029.5152522145. The cubic root of 6245664281 is about 1841.5897061111.

The spelling of 6245664281 in words is "six billion, two hundred forty-five million, six hundred sixty-four thousand, two hundred eighty-one".