6505278841 has 4 divisors (see below), whose sum is σ = 6568436992. Its totient is φ = 6442120692.

The previous prime is 6505278781. The next prime is 6505278847. The reversal of 6505278841 is 1488725056.

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 a cyclic number.

It is not a de Polignac number, because 6505278841 - 2¹⁷ = 6505147769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6505278791 and 6505278800.

It is not an unprimeable number, because it can be changed into a prime (6505278847) 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, 31578921 + ... + 31579126.

It is an arithmetic number, because the mean of its divisors is an integer number (1642109248).

Almost surely, 2^6505278841 is an apocalyptic number.

It is an amenable number.

6505278841 is a deficient number, since it is larger than the sum of its proper divisors (63158151).

6505278841 is a wasteful number, since it uses less digits than its factorization.

6505278841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63158150.

The product of its (nonzero) digits is 537600, while the sum is 46.

The square root of 6505278841 is about 80655.3088209325. The cubic root of 6505278841 is about 1866.7606553688.

The spelling of 6505278841 in words is "six billion, five hundred five million, two hundred seventy-eight thousand, eight hundred forty-one".