2649979869 has 16 divisors (see below), whose sum is σ = 3574981440. Its totient is φ = 1745896320.

The previous prime is 2649979859. The next prime is 2649979879. The reversal of 2649979869 is 9689799462.

It is an interprime number because it is at equal distance from previous prime (2649979859) and next prime (2649979879).

It is not a de Polignac number, because 2649979869 - 2⁴ = 2649979853 is a prime.

It is a super-2 number, since 2×2649979869² = 14044786612210514322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649979859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125337 + ... + 144945.

It is an arithmetic number, because the mean of its divisors is an integer number (223436340).

Almost surely, 2^2649979869 is an apocalyptic number.

It is an amenable number.

2649979869 is a deficient number, since it is larger than the sum of its proper divisors (925001571).

2649979869 is a wasteful number, since it uses less digits than its factorization.

2649979869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20140.

The product of its digits is 105815808, while the sum is 69.

The square root of 2649979869 is about 51477.9551750067. The cubic root of 2649979869 is about 1383.8239995058.

The spelling of 2649979869 in words is "two billion, six hundred forty-nine million, nine hundred seventy-nine thousand, eight hundred sixty-nine".