6556039420 has 48 divisors (see below), whose sum is σ = 15741831168. Its totient is φ = 2246736960.

The previous prime is 6556039351. The next prime is 6556039423. The reversal of 6556039420 is 249306556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556039423) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 327829 + ... + 347251.

It is an arithmetic number, because the mean of its divisors is an integer number (327954816).

Almost surely, 2^6556039420 is an apocalyptic number.

It is an amenable number.

6556039420 is an abundant number, since it is smaller than the sum of its proper divisors (9185791748).

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

6556039420 is a wasteful number, since it uses less digits than its factorization.

6556039420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21850 (or 21848 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 6556039420 is about 80969.3733457287. The cubic root of 6556039420 is about 1871.6035146475.

The spelling of 6556039420 in words is "six billion, five hundred fifty-six million, thirty-nine thousand, four hundred twenty".