7744871868 has 12 divisors (see below), whose sum is σ = 18071367720. Its totient is φ = 2581623952.

The previous prime is 7744871867. The next prime is 7744871879. The reversal of 7744871868 is 8681784477.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7744871867) 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 in 3 ways as a sum of consecutive naturals, for example, 322702983 + ... + 322703006.

It is an arithmetic number, because the mean of its divisors is an integer number (1505947310).

Almost surely, 2^7744871868 is an apocalyptic number.

It is an amenable number.

7744871868 is an abundant number, since it is smaller than the sum of its proper divisors (10326495852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7744871868 is a wasteful number, since it uses less digits than its factorization.

7744871868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645405996 (or 645405994 counting only the distinct ones).

The product of its digits is 16859136, while the sum is 60.

The square root of 7744871868 is about 88004.9536560301. The cubic root of 7744871868 is about 1978.5092227117.

The spelling of 7744871868 in words is "seven billion, seven hundred forty-four million, eight hundred seventy-one thousand, eight hundred sixty-eight".