5143240644 has 72 divisors (see below), whose sum is σ = 12935760768. Its totient is φ = 1589561280.

The previous prime is 5143240643. The next prime is 5143240651. The reversal of 5143240644 is 4460423415.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (5143240643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190974 + ... + 216234.

It is an arithmetic number, because the mean of its divisors is an integer number (179663344).

Almost surely, 2^5143240644 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 5143240644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6467880384).

5143240644 is an abundant number, since it is smaller than the sum of its proper divisors (7792520124).

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

5143240644 is a wasteful number, since it uses less digits than its factorization.

5143240644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25353 (or 25332 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 5143240644 is about 71716.3903441884. The cubic root of 5143240644 is about 1726.1516520459.

The spelling of 5143240644 in words is "five billion, one hundred forty-three million, two hundred forty thousand, six hundred forty-four".