2644659256 has 8 divisors (see below), whose sum is σ = 4958736120. Its totient is φ = 1322329624.

The previous prime is 2644659253. The next prime is 2644659287. The reversal of 2644659256 is 6529564462.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644659253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165291196 + ... + 165291211.

It is an arithmetic number, because the mean of its divisors is an integer number (619842015).

Almost surely, 2^2644659256 is an apocalyptic number.

It is an amenable number.

2644659256 is a deficient number, since it is larger than the sum of its proper divisors (2314076864).

2644659256 is a wasteful number, since it uses less digits than its factorization.

2644659256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330582413 (or 330582409 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 49.

The square root of 2644659256 is about 51426.2506508106. The cubic root of 2644659256 is about 1382.8972345887.

The spelling of 2644659256 in words is "two billion, six hundred forty-four million, six hundred fifty-nine thousand, two hundred fifty-six".