256518201027018 has 48 divisors (see below), whose sum is σ = 606912658299360. Its totient is φ = 72048695683104.

The previous prime is 256518201026947. The next prime is 256518201027079. The reversal of 256518201027018 is 810720102815652.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7394142721 + ... + 7394177412.

It is an arithmetic number, because the mean of its divisors is an integer number (12644013714570).

Almost surely, 2^{256518201027018} is an apocalyptic number.

256518201027018 is an abundant number, since it is smaller than the sum of its proper divisors (350394457272342).

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

256518201027018 is a wasteful number, since it uses less digits than its factorization.

256518201027018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14788320211 (or 14788320204 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 48.

The spelling of 256518201027018 in words is "two hundred fifty-six trillion, five hundred eighteen billion, two hundred one million, twenty-seven thousand, eighteen".