6338872561 has 4 divisors (see below), whose sum is σ = 7244425792. Its totient is φ = 5433319332.

The previous prime is 6338872541. The next prime is 6338872571. The reversal of 6338872561 is 1652788336.

6338872561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6338872561 - 2¹¹ = 6338870513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6338872541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452776605 + ... + 452776618.

It is an arithmetic number, because the mean of its divisors is an integer number (1811106448).

Almost surely, 2^6338872561 is an apocalyptic number.

It is an amenable number.

6338872561 is a deficient number, since it is larger than the sum of its proper divisors (905553231).

6338872561 is an equidigital number, since it uses as much as digits as its factorization.

6338872561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905553230.

The product of its digits is 1451520, while the sum is 49.

The square root of 6338872561 is about 79617.0368765379. The cubic root of 6338872561 is about 1850.7056048137.

The spelling of 6338872561 in words is "six billion, three hundred thirty-eight million, eight hundred seventy-two thousand, five hundred sixty-one".