2656646273 has 2 divisors, whose sum is σ = 2656646274. Its totient is φ = 2656646272.

The previous prime is 2656646261. The next prime is 2656646347. The reversal of 2656646273 is 3726466562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2427335824 + 229310449 = 49268^2 + 15143^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656646273 - 2⁸ = 2656646017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2656646233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328323136 + 1328323137.

It is an arithmetic number, because the mean of its divisors is an integer number (1328323137).

Almost surely, 2^2656646273 is an apocalyptic number.

It is an amenable number.

2656646273 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656646273 is an equidigital number, since it uses as much as digits as its factorization.

2656646273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 47.

The square root of 2656646273 is about 51542.6645896387. The cubic root of 2656646273 is about 1384.9834303170.

The spelling of 2656646273 in words is "two billion, six hundred fifty-six million, six hundred forty-six thousand, two hundred seventy-three".