6484578940 has 96 divisors (see below), whose sum is σ = 16506491904. Its totient is φ = 2088944640.

The previous prime is 6484578869. The next prime is 6484579001. The reversal of 6484578940 is 498754846.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1642609 + ... + 1646551.

It is an arithmetic number, because the mean of its divisors is an integer number (171942624).

Almost surely, 2^6484578940 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 6484578940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8253245952).

6484578940 is an abundant number, since it is smaller than the sum of its proper divisors (10021912964).

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

6484578940 is a wasteful number, since it uses less digits than its factorization.

6484578940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4667 (or 4665 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 55.

The square root of 6484578940 is about 80526.8833371813. The cubic root of 6484578940 is about 1864.7785307720.

The spelling of 6484578940 in words is "six billion, four hundred eighty-four million, five hundred seventy-eight thousand, nine hundred forty".