6340565281 has 2 divisors, whose sum is σ = 6340565282. Its totient is φ = 6340565280.

The previous prime is 6340565251. The next prime is 6340565303. The reversal of 6340565281 is 1825650436.

6340565281 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5648875281 + 691690000 = 75159^2 + 26300^2 .

It is a cyclic number.

It is not a de Polignac number, because 6340565281 - 2¹¹ = 6340563233 is a prime.

It is a super-2 number, since 2×6340565281² = 80405536165245217922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6340565251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3170282640 + 3170282641.

It is an arithmetic number, because the mean of its divisors is an integer number (3170282641).

Almost surely, 2^6340565281 is an apocalyptic number.

It is an amenable number.

6340565281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6340565281 is an equidigital number, since it uses as much as digits as its factorization.

6340565281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 6340565281 is about 79627.6665550360. Note that the first 3 decimals coincide. The cubic root of 6340565281 is about 1850.8703264079.

The spelling of 6340565281 in words is "six billion, three hundred forty million, five hundred sixty-five thousand, two hundred eighty-one".