2644065025 has 12 divisors (see below), whose sum is σ = 3747018112. Its totient is φ = 1813073040.

The previous prime is 2644065013. The next prime is 2644065059. The reversal of 2644065025 is 5205604462.

It is not a de Polignac number, because 2644065025 - 2¹⁷ = 2643933953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7554297 + ... + 7554646.

Almost surely, 2^2644065025 is an apocalyptic number.

2644065025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2644065025 is a deficient number, since it is larger than the sum of its proper divisors (1102953087).

2644065025 is a wasteful number, since it uses less digits than its factorization.

2644065025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15108960 (or 15108955 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 2644065025 is about 51420.4728196854. The cubic root of 2644065025 is about 1382.7936519993.

Adding to 2644065025 its reverse (5205604462), we get a palindrome (7849669487).

The spelling of 2644065025 in words is "two billion, six hundred forty-four million, sixty-five thousand, twenty-five".