2544491520 has 132 divisors (see below), whose sum is σ = 8816756520. Its totient is φ = 678518784.

The previous prime is 2544491519. The next prime is 2544491549. The reversal of 2544491520 is 251944452.

It is a happy number.

2544491520 is a `hidden beast` number, since 2 + 5 + 4 + 44 + 91 + 520 = 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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18471 + ... + 73689.

It is an arithmetic number, because the mean of its divisors is an integer number (66793610).

Almost surely, 2^2544491520 is an apocalyptic number.

2544491520 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 2544491520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4408378260).

2544491520 is an abundant number, since it is smaller than the sum of its proper divisors (6272265000).

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

2544491520 is a wasteful number, since it uses less digits than its factorization.

2544491520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55250 (or 55229 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 2544491520 is about 50442.9531252880. The cubic root of 2544491520 is about 1365.2127511239.

It can be divided in two parts, 25444 and 91520, that added together give a square (116964 = 342²).

The spelling of 2544491520 in words is "two billion, five hundred forty-four million, four hundred ninety-one thousand, five hundred twenty".