2641808656 has 10 divisors (see below), whose sum is σ = 5118504302. Its totient is φ = 1320904320.

The previous prime is 2641808651. The next prime is 2641808671. The reversal of 2641808656 is 6568081462.

2641808656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2079360000 + 562448656 = 45600^2 + 23716^2 .

It is not an unprimeable number, because it can be changed into a prime (2641808651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82556505 + ... + 82556536.

Almost surely, 2^2641808656 is an apocalyptic number.

It is an amenable number.

2641808656 is a deficient number, since it is larger than the sum of its proper divisors (2476695646).

2641808656 is a wasteful number, since it uses less digits than its factorization.

2641808656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165113049 (or 165113043 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 2641808656 is about 51398.5277610167. The cubic root of 2641808656 is about 1382.4001946204.

The spelling of 2641808656 in words is "two billion, six hundred forty-one million, eight hundred eight thousand, six hundred fifty-six".