2545449844 has 72 divisors (see below), whose sum is σ = 5340535200. Its totient is φ = 1057863744.

The previous prime is 2545449839. The next prime is 2545449853. The reversal of 2545449844 is 4489445452.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1254759 + ... + 1256785.

It is an arithmetic number, because the mean of its divisors is an integer number (74174100).

Almost surely, 2^2545449844 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 2545449844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2670267600).

2545449844 is an abundant number, since it is smaller than the sum of its proper divisors (2795085356).

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

2545449844 is a wasteful number, since it uses less digits than its factorization.

2545449844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237 (or 2228 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 49.

The square root of 2545449844 is about 50452.4513180480. The cubic root of 2545449844 is about 1365.3841215685.

The spelling of 2545449844 in words is "two billion, five hundred forty-five million, four hundred forty-nine thousand, eight hundred forty-four".