2159181360 has 640 divisors, whose sum is σ = 9019422720. Its totient is φ = 470292480.

The previous prime is 2159181347. The next prime is 2159181377. The reversal of 2159181360 is 631819512.

2159181360 is a `hidden beast` number, since 2 + 1 + 591 + 8 + 1 + 3 + 60 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 50213499 + ... + 50213541.

It is an arithmetic number, because the mean of its divisors is an integer number (14092848).

Almost surely, 2^2159181360 is an apocalyptic number.

2159181360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2159181360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4509711360).

2159181360 is an abundant number, since it is smaller than the sum of its proper divisors (6860241360).

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

2159181360 is an equidigital number, since it uses as much as digits as its factorization.

2159181360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 2159181360 is about 46466.9921557228. The cubic root of 2159181360 is about 1292.4974872343.

The spelling of 2159181360 in words is "two billion, one hundred fifty-nine million, one hundred eighty-one thousand, three hundred sixty".