256506443245364 has 24 divisors (see below), whose sum is σ = 483423454401888. Its totient is φ = 118385760975840.

The previous prime is 256506443245361. The next prime is 256506443245373. The reversal of 256506443245364 is 463542344605652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256506443245361) 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, 34685222 + ... + 41425565.

It is an arithmetic number, because the mean of its divisors is an integer number (20142643933412).

Almost surely, 2^{256506443245364} is an apocalyptic number.

It is an amenable number.

256506443245364 is a deficient number, since it is larger than the sum of its proper divisors (226917011156524).

256506443245364 is a wasteful number, since it uses less digits than its factorization.

256506443245364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76175615 (or 76175613 counting only the distinct ones).

The product of its (nonzero) digits is 248832000, while the sum is 59.

The spelling of 256506443245364 in words is "two hundred fifty-six trillion, five hundred six billion, four hundred forty-three million, two hundred forty-five thousand, three hundred sixty-four".