6644360460 has 48 divisors (see below), whose sum is σ = 18692416512. Its totient is φ = 1763428800.

The previous prime is 6644360449. The next prime is 6644360467. The reversal of 6644360460 is 640634466.

It is a super-2 number, since 2×6644360460² = 88295051844822823200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6644360467) 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, 249756 + ... + 275075.

It is an arithmetic number, because the mean of its divisors is an integer number (389425344).

Almost surely, 2^6644360460 is an apocalyptic number.

6644360460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6644360460 is an abundant number, since it is smaller than the sum of its proper divisors (12048056052).

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

6644360460 is a wasteful number, since it uses less digits than its factorization.

6644360460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525054 (or 525052 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 39.

The square root of 6644360460 is about 81512.9465790558. The cubic root of 6644360460 is about 1879.9706178447.

The spelling of 6644360460 in words is "six billion, six hundred forty-four million, three hundred sixty thousand, four hundred sixty".