6447364530 has 64 divisors (see below), whose sum is σ = 15909239808. Its totient is φ = 1671284160.

The previous prime is 6447364457. The next prime is 6447364537. The reversal of 6447364530 is 354637446.

It is not an unprimeable number, because it can be changed into a prime (6447364537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260347 + ... + 284033.

It is an arithmetic number, because the mean of its divisors is an integer number (248581872).

Almost surely, 2^6447364530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6447364530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7954619904).

6447364530 is an abundant number, since it is smaller than the sum of its proper divisors (9461875278).

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

6447364530 is a wasteful number, since it uses less digits than its factorization.

6447364530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23951.

The product of its (nonzero) digits is 725760, while the sum is 42.

The square root of 6447364530 is about 80295.4826251141. The cubic root of 6447364530 is about 1861.2044199476.

The spelling of 6447364530 in words is "six billion, four hundred forty-seven million, three hundred sixty-four thousand, five hundred thirty".