256356231936 has 144 divisors (see below), whose sum is σ = 780115198464. Its totient is φ = 73210355712.

The previous prime is 256356231917. The next prime is 256356231977. The reversal of 256356231936 is 639132653652.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12854805 + ... + 12874731.

It is an arithmetic number, because the mean of its divisors is an integer number (5417466656).

Almost surely, 2^256356231936 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 256356231936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390057599232).

256356231936 is an abundant number, since it is smaller than the sum of its proper divisors (523758966528).

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

256356231936 is a wasteful number, since it uses less digits than its factorization.

256356231936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22346 (or 22332 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 51.

The spelling of 256356231936 in words is "two hundred fifty-six billion, three hundred fifty-six million, two hundred thirty-one thousand, nine hundred thirty-six".