2645281601 has 4 divisors (see below), whose sum is σ = 2646004692. Its totient is φ = 2644558512.

The previous prime is 2645281567. The next prime is 2645281609. The reversal of 2645281601 is 1061825462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 798345025 + 1846936576 = 28255^2 + 42976^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2645281601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645281609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356030 + ... + 363383.

It is an arithmetic number, because the mean of its divisors is an integer number (661501173).

Almost surely, 2^2645281601 is an apocalyptic number.

It is an amenable number.

2645281601 is a deficient number, since it is larger than the sum of its proper divisors (723091).

2645281601 is an equidigital number, since it uses as much as digits as its factorization.

2645281601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723090.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 2645281601 is about 51432.3011443198. The cubic root of 2645281601 is about 1383.0057011996.

The spelling of 2645281601 in words is "two billion, six hundred forty-five million, two hundred eighty-one thousand, six hundred one".