6420256032 has 48 divisors (see below), whose sum is σ = 16857433152. Its totient is φ = 2139544320.

The previous prime is 6420256027. The next prime is 6420256061. The reversal of 6420256032 is 2306520246.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600558 + ... + 611154.

It is an arithmetic number, because the mean of its divisors is an integer number (351196524).

Almost surely, 2^6420256032 is an apocalyptic number.

It is an amenable number.

6420256032 is an abundant number, since it is smaller than the sum of its proper divisors (10437177120).

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

6420256032 is a wasteful number, since it uses less digits than its factorization.

6420256032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16921 (or 16913 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 6420256032 is about 80126.5001856440. The cubic root of 6420256032 is about 1858.5922241649.

Adding to 6420256032 its reverse (2306520246), we get a palindrome (8726776278).

The spelling of 6420256032 in words is "six billion, four hundred twenty million, two hundred fifty-six thousand, thirty-two".