256616500 has 96 divisors (see below), whose sum is σ = 645974784. Its totient is φ = 87235200.

The previous prime is 256616483. The next prime is 256616519. The reversal of 256616500 is 5616652.

256616500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 549267 + ... + 549733.

It is an arithmetic number, because the mean of its divisors is an integer number (6728904).

Almost surely, 2^256616500 is an apocalyptic number.

256616500 is a gapful number since it is divisible by the number (20) 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 256616500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322987392).

256616500 is an abundant number, since it is smaller than the sum of its proper divisors (389358284).

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

256616500 is a wasteful number, since it uses less digits than its factorization.

256616500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 256616500 is about 16019.2540400607. The cubic root of 256616500 is about 635.4697167330.

The spelling of 256616500 in words is "two hundred fifty-six million, six hundred sixteen thousand, five hundred".