2656343865 has 16 divisors (see below), whose sum is σ = 4857314688. Its totient is φ = 1214328576.

The previous prime is 2656343821. The next prime is 2656343867. The reversal of 2656343865 is 5683436562.

It is not a de Polignac number, because 2656343865 - 2¹⁴ = 2656327481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2656343867) 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 15 ways as a sum of consecutive naturals, for example, 12649152 + ... + 12649361.

It is an arithmetic number, because the mean of its divisors is an integer number (303582168).

Almost surely, 2^2656343865 is an apocalyptic number.

It is an amenable number.

2656343865 is a deficient number, since it is larger than the sum of its proper divisors (2200970823).

2656343865 is a wasteful number, since it uses less digits than its factorization.

2656343865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25298528.

The product of its digits is 3110400, while the sum is 48.

The square root of 2656343865 is about 51539.7309364339. The cubic root of 2656343865 is about 1384.9308770952.

The spelling of 2656343865 in words is "two billion, six hundred fifty-six million, three hundred forty-three thousand, eight hundred sixty-five".