2159360856 has 80 divisors (see below), whose sum is σ = 6176982240. Its totient is φ = 704462400.

The previous prime is 2159360837. The next prime is 2159360867. The reversal of 2159360856 is 6580639512.

2159360856 is a `hidden beast` number, since 2 + 1 + 593 + 6 + 0 + 8 + 56 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4995 + ... + 65906.

It is an arithmetic number, because the mean of its divisors is an integer number (77212278).

Almost surely, 2^2159360856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2159360856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3088491120).

2159360856 is an abundant number, since it is smaller than the sum of its proper divisors (4017621384).

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

2159360856 is a wasteful number, since it uses less digits than its factorization.

2159360856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70966 (or 70953 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 2159360856 is about 46468.9235511218. The cubic root of 2159360856 is about 1292.5333019964.

The spelling of 2159360856 in words is "two billion, one hundred fifty-nine million, three hundred sixty thousand, eight hundred fifty-six".