256510536456 has 64 divisors (see below), whose sum is σ = 643896187200. Its totient is φ = 85154796288.

The previous prime is 256510536433. The next prime is 256510536473. The reversal of 256510536456 is 654635015652.

It is a super-3 number, since 3×256510536456³ (a number of 35 digits) contains 333 as substring.

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, 7085730 + ... + 7121838.

It is an arithmetic number, because the mean of its divisors is an integer number (10060877925).

Almost surely, 2^256510536456 is an apocalyptic number.

It is an amenable number.

256510536456 is an abundant number, since it is smaller than the sum of its proper divisors (387385650744).

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

256510536456 is a wasteful number, since it uses less digits than its factorization.

256510536456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37318 (or 37314 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 48.

The spelling of 256510536456 in words is "two hundred fifty-six billion, five hundred ten million, five hundred thirty-six thousand, four hundred fifty-six".