256602081152 has 64 divisors (see below), whose sum is σ = 536509971360. Its totient is φ = 122013112320.

The previous prime is 256602081121. The next prime is 256602081157. The reversal of 256602081152 is 251180206652.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256602081157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257402 + ... + 761222.

Almost surely, 2^256602081152 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 256602081152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268254985680).

256602081152 is an abundant number, since it is smaller than the sum of its proper divisors (279907890208).

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

256602081152 is a wasteful number, since it uses less digits than its factorization.

256602081152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504031 (or 504019 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 256602081152 in words is "two hundred fifty-six billion, six hundred two million, eighty-one thousand, one hundred fifty-two".