6447364531 has 16 divisors (see below), whose sum is σ = 6956034048. Its totient is φ = 5958374400.

The previous prime is 6447364457. The next prime is 6447364537. The reversal of 6447364531 is 1354637446.

It is a cyclic number.

It is not a de Polignac number, because 6447364531 - 2¹¹ = 6447362483 is a prime.

It is a super-2 number, since 2×6447364531² = 83137018791193699922, which contains 22 as substring.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 449980 + ... + 464086.

It is an arithmetic number, because the mean of its divisors is an integer number (434752128).

Almost surely, 2^6447364531 is an apocalyptic number.

6447364531 is a deficient number, since it is larger than the sum of its proper divisors (508669517).

6447364531 is a wasteful number, since it uses less digits than its factorization.

6447364531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14802.

The product of its digits is 725760, while the sum is 43.

The square root of 6447364531 is about 80295.4826313411. The cubic root of 6447364531 is about 1861.2044200438.

The spelling of 6447364531 in words is "six billion, four hundred forty-seven million, three hundred sixty-four thousand, five hundred thirty-one".