6503240523738 has 144 divisors (see below), whose sum is σ = 15555664559232. Its totient is φ = 1806404544000.

The previous prime is 6503240523707. The next prime is 6503240523751. The reversal of 6503240523738 is 8373250423056.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 315053898 + ... + 315074538.

It is an arithmetic number, because the mean of its divisors is an integer number (108025448328).

Almost surely, 2^{6503240523738} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6503240523738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7777832279616).

6503240523738 is an abundant number, since it is smaller than the sum of its proper divisors (9052424035494).

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

6503240523738 is a wasteful number, since it uses less digits than its factorization.

6503240523738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21009 (or 20851 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 48.

The spelling of 6503240523738 in words is "six trillion, five hundred three billion, two hundred forty million, five hundred twenty-three thousand, seven hundred thirty-eight".