2159644032 has 576 divisors, whose sum is σ = 8147739600. Its totient is φ = 564350976.

The previous prime is 2159644013. The next prime is 2159644037. The reversal of 2159644032 is 2304469512.

It is a happy number.

2159644032 is a `hidden beast` number, since 2 + 1 + 5 + 9 + 644 + 0 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159644037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19813194 + ... + 19813302.

Almost surely, 2^2159644032 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 2159644032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4073869800).

2159644032 is an abundant number, since it is smaller than the sum of its proper divisors (5988095568).

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

2159644032 is a wasteful number, since it uses less digits than its factorization.

2159644032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 2159644032 is about 46471.9703907635. The cubic root of 2159644032 is about 1292.5897999506.

The spelling of 2159644032 in words is "two billion, one hundred fifty-nine million, six hundred forty-four thousand, thirty-two".