2159138544 has 40 divisors (see below), whose sum is σ = 5590036560. Its totient is φ = 718130688.

The previous prime is 2159138543. The next prime is 2159138551. The reversal of 2159138544 is 4458319512.

It is a junction number, because it is equal to n+sod(n) for n = 2159138496 and 2159138505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159138543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27279 + ... + 71150.

It is an arithmetic number, because the mean of its divisors is an integer number (139750914).

Almost surely, 2^2159138544 is an apocalyptic number.

2159138544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2159138544 is an abundant number, since it is smaller than the sum of its proper divisors (3430898016).

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

2159138544 is a wasteful number, since it uses less digits than its factorization.

2159138544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98897 (or 98891 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 2159138544 is about 46466.5314393059. The cubic root of 2159138544 is about 1292.4889438824.

The spelling of 2159138544 in words is "two billion, one hundred fifty-nine million, one hundred thirty-eight thousand, five hundred forty-four".