6428805140856 has 128 divisors (see below), whose sum is σ = 18604202803200. Its totient is φ = 1813191868800.

The previous prime is 6428805140843. The next prime is 6428805140861. The reversal of 6428805140856 is 6580415088246.

It is a junction number, because it is equal to n+sod(n) for n = 6428805140796 and 6428805140805.

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, 70973211 + ... + 71063733.

It is an arithmetic number, because the mean of its divisors is an integer number (145345334400).

Almost surely, 2^{6428805140856} 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 6428805140856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9302101401600).

6428805140856 is an abundant number, since it is smaller than the sum of its proper divisors (12175397662344).

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

6428805140856 is a wasteful number, since it uses less digits than its factorization.

6428805140856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95969 (or 95965 counting only the distinct ones).

The product of its (nonzero) digits is 14745600, while the sum is 57.

The spelling of 6428805140856 in words is "six trillion, four hundred twenty-eight billion, eight hundred five million, one hundred forty thousand, eight hundred fifty-six".