2728646651 has 2 divisors, whose sum is σ = 2728646652. Its totient is φ = 2728646650.

The previous prime is 2728646593. The next prime is 2728646671. The reversal of 2728646651 is 1566468272.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2728646651 - 2¹⁸ = 2728384507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2728646596 and 2728646605.

It is not a weakly prime, because it can be changed into another prime (2728646671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364323325 + 1364323326.

It is an arithmetic number, because the mean of its divisors is an integer number (1364323326).

Almost surely, 2^2728646651 is an apocalyptic number.

2728646651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728646651 is an equidigital number, since it uses as much as digits as its factorization.

2728646651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 47.

The square root of 2728646651 is about 52236.4494486369. The cubic root of 2728646651 is about 1397.3840010903.

It can be divided in two parts, 27286 and 46651, that added together give a palindrome (73937).

The spelling of 2728646651 in words is "two billion, seven hundred twenty-eight million, six hundred forty-six thousand, six hundred fifty-one".