2155355168 has 54 divisors (see below), whose sum is σ = 4410307629. Its totient is φ = 1036839552.

The previous prime is 2155355131. The next prime is 2155355171. The reversal of 2155355168 is 8615535512.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 2154073744 + 1281424 = 46412^2 + 1132^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=32828.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7615955 + ... + 7616237.

Almost surely, 2^2155355168 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 2155355168

2155355168 is an abundant number, since it is smaller than the sum of its proper divisors (2254952461).

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

2155355168 is an frugal number, since it uses more digits than its factorization.

2155355168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 314 counting only the distinct ones).

The product of its digits is 180000, while the sum is 41.

The square root of 2155355168 is about 46425.8028255840. The cubic root of 2155355168 is about 1291.7335761737.

Multiplying 2155355168 by its product of digits (180000), we get a square (387963930240000 = 19696800²).

The spelling of 2155355168 in words is "two billion, one hundred fifty-five million, three hundred fifty-five thousand, one hundred sixty-eight".