2168564949 has 24 divisors (see below), whose sum is σ = 3220529312. Its totient is φ = 1405343520.

The previous prime is 2168564941. The next prime is 2168564969. The reversal of 2168564949 is 9494658612.

It is not a de Polignac number, because 2168564949 - 2³ = 2168564941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2168564895 and 2168564904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168564941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68379 + ... + 94935.

Almost surely, 2^2168564949 is an apocalyptic number.

It is an amenable number.

2168564949 is a deficient number, since it is larger than the sum of its proper divisors (1051964363).

2168564949 is a wasteful number, since it uses less digits than its factorization.

2168564949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26817 (or 26814 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 2168564949 is about 46567.8531714744. The cubic root of 2168564949 is about 1294.3671368942.

The spelling of 2168564949 in words is "two billion, one hundred sixty-eight million, five hundred sixty-four thousand, nine hundred forty-nine".