6256721000 has 128 divisors (see below), whose sum is σ = 15342912000. Its totient is φ = 2384928000.

The previous prime is 6256720993. The next prime is 6256721039. The reversal of 6256721000 is 1276526.

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 2289635 + ... + 2292365.

It is an arithmetic number, because the mean of its divisors is an integer number (119866500).

Almost surely, 2^6256721000 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 6256721000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7671456000).

6256721000 is an abundant number, since it is smaller than the sum of its proper divisors (9086191000).

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

6256721000 is a wasteful number, since it uses less digits than its factorization.

6256721000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860 (or 2846 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 6256721000 is about 79099.4374189855. The cubic root of 6256721000 is about 1842.6757894685.

Adding to 6256721000 its reverse (1276526), we get a palindrome (6257997526).

The spelling of 6256721000 in words is "six billion, two hundred fifty-six million, seven hundred twenty-one thousand".