2649318643 has 2 divisors, whose sum is σ = 2649318644. Its totient is φ = 2649318642.

The previous prime is 2649318631. The next prime is 2649318647. The reversal of 2649318643 is 3468139462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2649318643 - 2¹³ = 2649310451 is a prime.

It is a super-2 number, since 2×2649318643² = 14037778544294722898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2649318593 and 2649318602.

It is not a weakly prime, because it can be changed into another prime (2649318647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324659321 + 1324659322.

It is an arithmetic number, because the mean of its divisors is an integer number (1324659322).

Almost surely, 2^2649318643 is an apocalyptic number.

2649318643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2649318643 is an equidigital number, since it uses as much as digits as its factorization.

2649318643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 46.

The square root of 2649318643 is about 51471.5323552738. The cubic root of 2649318643 is about 1383.7088921504.

The spelling of 2649318643 in words is "two billion, six hundred forty-nine million, three hundred eighteen thousand, six hundred forty-three".