2156868344 has 16 divisors (see below), whose sum is σ = 4046638200. Its totient is φ = 1077764832.

The previous prime is 2156868341. The next prime is 2156868377. The reversal of 2156868344 is 4438686512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156868341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69839 + ... + 95870.

Almost surely, 2^2156868344 is an apocalyptic number.

It is an amenable number.

2156868344 is a deficient number, since it is larger than the sum of its proper divisors (1889769856).

2156868344 is a wasteful number, since it uses less digits than its factorization.

2156868344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167342 (or 167338 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 2156868344 is about 46442.0966796289. The cubic root of 2156868344 is about 1292.0357944247.

The spelling of 2156868344 in words is "two billion, one hundred fifty-six million, eight hundred sixty-eight thousand, three hundred forty-four".