6440425060 has 48 divisors (see below), whose sum is σ = 14277816000. Its totient is φ = 2433538944.

The previous prime is 6440425037. The next prime is 6440425111. The reversal of 6440425060 is 605240446.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108339 + ... + 156901.

It is an arithmetic number, because the mean of its divisors is an integer number (297454500).

Almost surely, 2^6440425060 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 6440425060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7138908000).

6440425060 is an abundant number, since it is smaller than the sum of its proper divisors (7837390940).

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

6440425060 is a wasteful number, since it uses less digits than its factorization.

6440425060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48940 (or 48938 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 6440425060 is about 80252.2589090176. The cubic root of 6440425060 is about 1860.5364256164.

The spelling of 6440425060 in words is "six billion, four hundred forty million, four hundred twenty-five thousand, sixty".