2621385668 has 48 divisors (see below), whose sum is σ = 5199226368. Its totient is φ = 1145664000.

The previous prime is 2621385659. The next prime is 2621385707. The reversal of 2621385668 is 8665831262.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 208028 + ... + 220268.

It is an arithmetic number, because the mean of its divisors is an integer number (108317216).

Almost surely, 2^2621385668 is an apocalyptic number.

It is an amenable number.

2621385668 is a deficient number, since it is larger than the sum of its proper divisors (2577840700).

2621385668 is a wasteful number, since it uses less digits than its factorization.

2621385668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12444 (or 12442 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 2621385668 is about 51199.4694113132. The cubic root of 2621385668 is about 1378.8286756150.

The spelling of 2621385668 in words is "two billion, six hundred twenty-one million, three hundred eighty-five thousand, six hundred sixty-eight".