2145052544 has 64 divisors (see below), whose sum is σ = 4338468000. Its totient is φ = 1056307200.

The previous prime is 2145052543. The next prime is 2145052561. The reversal of 2145052544 is 4452505412.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 2145052544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145052543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3580757 + ... + 3581355.

Almost surely, 2^2145052544 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 2145052544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2169234000).

2145052544 is an abundant number, since it is smaller than the sum of its proper divisors (2193415456).

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

2145052544 is a wasteful number, since it uses less digits than its factorization.

2145052544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 2145052544 is about 46314.7119606718. The cubic root of 2145052544 is about 1289.6721206641.

Adding to 2145052544 its reverse (4452505412), we get a palindrome (6597557956).

The spelling of 2145052544 in words is "two billion, one hundred forty-five million, fifty-two thousand, five hundred forty-four".