6447795464 has 64 divisors (see below), whose sum is σ = 14221569600. Its totient is φ = 2708812800.

The previous prime is 6447795457. The next prime is 6447795469. The reversal of 6447795464 is 4645977446.

It is not an unprimeable number, because it can be changed into a prime (6447795469) 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, 21524 + ... + 115580.

It is an arithmetic number, because the mean of its divisors is an integer number (222212025).

Almost surely, 2^6447795464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6447795464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7110784800).

6447795464 is an abundant number, since it is smaller than the sum of its proper divisors (7773774136).

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

6447795464 is a wasteful number, since it uses less digits than its factorization.

6447795464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94134 (or 94130 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 56.

The square root of 6447795464 is about 80298.1660064537. The cubic root of 6447795464 is about 1861.2458859033.

The spelling of 6447795464 in words is "six billion, four hundred forty-seven million, seven hundred ninety-five thousand, four hundred sixty-four".