6256521216 has 416 divisors, whose sum is σ = 20916537600. Its totient is φ = 1831403520.

The previous prime is 6256521211. The next prime is 6256521259. The reversal of 6256521216 is 6121256526.

6256521216 is a `hidden beast` number, since 62 + 56 + 521 + 21 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (43200) is a multiple of the sum of its prime divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6256521211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45010875 + ... + 45011013.

Almost surely, 2^6256521216 is an apocalyptic number.

6256521216 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6256521216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10458268800).

6256521216 is an abundant number, since it is smaller than the sum of its proper divisors (14660016384).

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

6256521216 is a wasteful number, since it uses less digits than its factorization.

6256521216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 192 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 6256521216 is about 79098.1745427794. The cubic root of 6256521216 is about 1842.6561763699.

The spelling of 6256521216 in words is "six billion, two hundred fifty-six million, five hundred twenty-one thousand, two hundred sixteen".