2645621276 has 12 divisors (see below), whose sum is σ = 4831134672. Its totient is φ = 1265297088.

The previous prime is 2645621273. The next prime is 2645621291. The reversal of 2645621276 is 6721265462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645621273) 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, 14378285 + ... + 14378468.

It is an arithmetic number, because the mean of its divisors is an integer number (402594556).

Almost surely, 2^2645621276 is an apocalyptic number.

It is an amenable number.

2645621276 is a deficient number, since it is larger than the sum of its proper divisors (2185513396).

2645621276 is a wasteful number, since it uses less digits than its factorization.

2645621276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28756780 (or 28756778 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 2645621276 is about 51435.6031946744. The cubic root of 2645621276 is about 1383.0648949423.

The spelling of 2645621276 in words is "two billion, six hundred forty-five million, six hundred twenty-one thousand, two hundred seventy-six".