2656042643 has 2 divisors, whose sum is σ = 2656042644. Its totient is φ = 2656042642.

The previous prime is 2656042573. The next prime is 2656042657. The reversal of 2656042643 is 3462406562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2656042643 - 2¹² = 2656038547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2656042597 and 2656042606.

It is not a weakly prime, because it can be changed into another prime (2656042043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328021321 + 1328021322.

It is an arithmetic number, because the mean of its divisors is an integer number (1328021322).

Almost surely, 2^2656042643 is an apocalyptic number.

2656042643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656042643 is an equidigital number, since it uses as much as digits as its factorization.

2656042643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 38.

The square root of 2656042643 is about 51536.8086225758. The cubic root of 2656042643 is about 1384.8785260142.

The spelling of 2656042643 in words is "two billion, six hundred fifty-six million, forty-two thousand, six hundred forty-three".