6505644715 has 4 divisors (see below), whose sum is σ = 7806773664. Its totient is φ = 5204515768.

The previous prime is 6505644713. The next prime is 6505644793. The reversal of 6505644715 is 5174465056.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6505644715 - 2¹ = 6505644713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6505644713) 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, 650564467 + ... + 650564476.

It is an arithmetic number, because the mean of its divisors is an integer number (1951693416).

Almost surely, 2^6505644715 is an apocalyptic number.

6505644715 is a deficient number, since it is larger than the sum of its proper divisors (1301128949).

6505644715 is a wasteful number, since it uses less digits than its factorization.

6505644715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301128948.

The product of its (nonzero) digits is 504000, while the sum is 43.

The square root of 6505644715 is about 80657.5769224442. The cubic root of 6505644715 is about 1866.7956518899.

The spelling of 6505644715 in words is "six billion, five hundred five million, six hundred forty-four thousand, seven hundred fifteen".