6444140500 has 96 divisors (see below), whose sum is σ = 16603711488. Its totient is φ = 2138112000.

The previous prime is 6444140447. The next prime is 6444140543. The reversal of 6444140500 is 50414446.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78804 + ... + 138196.

It is an arithmetic number, because the mean of its divisors is an integer number (172955328).

Almost surely, 2^6444140500 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 6444140500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8301855744).

6444140500 is an abundant number, since it is smaller than the sum of its proper divisors (10159570988).

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

6444140500 is a wasteful number, since it uses less digits than its factorization.

6444140500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59450 (or 59438 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 6444140500 is about 80275.4040787089. The cubic root of 6444140500 is about 1860.8941340243.

Adding to 6444140500 its reverse (50414446), we get a palindrome (6494554946).

The spelling of 6444140500 in words is "six billion, four hundred forty-four million, one hundred forty thousand, five hundred".