2127156856 has 32 divisors (see below), whose sum is σ = 4580006400. Its totient is φ = 915999840.

The previous prime is 2127156851. The next prime is 2127156869. The reversal of 2127156856 is 6586517212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2127156851) 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 7 ways as a sum of consecutive naturals, for example, 634440 + ... + 637783.

It is an arithmetic number, because the mean of its divisors is an integer number (143125200).

Almost surely, 2^2127156856 is an apocalyptic number.

It is an amenable number.

2127156856 is an abundant number, since it is smaller than the sum of its proper divisors (2452849544).

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

2127156856 is a wasteful number, since it uses less digits than its factorization.

2127156856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272259 (or 1272255 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The square root of 2127156856 is about 46121.1107411779. The cubic root of 2127156856 is about 1286.0756195521.

The spelling of 2127156856 in words is "two billion, one hundred twenty-seven million, one hundred fifty-six thousand, eight hundred fifty-six".