2645005012 has 24 divisors (see below), whose sum is σ = 5028941736. Its totient is φ = 1209965568.

The previous prime is 2645005003. The next prime is 2645005019. The reversal of 2645005012 is 2105005462.

It can be written as a sum of positive squares in 4 ways, for example, as 421316676 + 2223688336 = 20526^2 + 47156^2 .

It is a super-4 number, since 4×2645005012⁴ (a number of 39 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645005019) 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 7 ways as a sum of consecutive naturals, for example, 219193 + ... + 230944.

It is an arithmetic number, because the mean of its divisors is an integer number (209539239).

Almost surely, 2^2645005012 is an apocalyptic number.

It is an amenable number.

2645005012 is a deficient number, since it is larger than the sum of its proper divisors (2383936724).

2645005012 is a wasteful number, since it uses less digits than its factorization.

2645005012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450267 (or 450265 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2645005012 is about 51429.6122093099. The cubic root of 2645005012 is about 1382.9574974473.

The spelling of 2645005012 in words is "two billion, six hundred forty-five million, five thousand, twelve".