2155424544 has 432 divisors, whose sum is σ = 7947313920. Its totient is φ = 548674560.

The previous prime is 2155424539. The next prime is 2155424573. The reversal of 2155424544 is 4454245512.

2155424544 is a `hidden beast` number, since 21 + 55 + 42 + 4 + 544 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 2155424499 and 2155424508.

It is an unprimeable number.

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, 5686947 + ... + 5687325.

It is an arithmetic number, because the mean of its divisors is an integer number (18396560).

Almost surely, 2^2155424544 is an apocalyptic number.

2155424544 is a gapful number since it is divisible by the number (24) 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 2155424544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3973656960).

2155424544 is an abundant number, since it is smaller than the sum of its proper divisors (5791889376).

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

2155424544 is a wasteful number, since it uses less digits than its factorization.

2155424544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 435 counting only the distinct ones).

The product of its digits is 128000, while the sum is 36.

The square root of 2155424544 is about 46426.5499902803. The cubic root of 2155424544 is about 1291.7474353508.

The spelling of 2155424544 in words is "two billion, one hundred fifty-five million, four hundred twenty-four thousand, five hundred forty-four".