256511016 has 32 divisors (see below), whose sum is σ = 712531200. Its totient is φ = 85503600.

The previous prime is 256510999. The next prime is 256511023. The reversal of 256511016 is 610115652.

It is a happy number.

256511016 is a `hidden beast` number, since 2 + 5 + 651 + 1 + 0 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593560 + ... + 593991.

It is an arithmetic number, because the mean of its divisors is an integer number (22266600).

Almost surely, 2^256511016 is an apocalyptic number.

It is an amenable number.

256511016 is an abundant number, since it is smaller than the sum of its proper divisors (456020184).

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

256511016 is a wasteful number, since it uses less digits than its factorization.

256511016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187566 (or 1187556 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 256511016 is about 16015.9612886645. The cubic root of 256511016 is about 635.3826333818.

Adding to 256511016 its reverse (610115652), we get a palindrome (866626668).

The spelling of 256511016 in words is "two hundred fifty-six million, five hundred eleven thousand, sixteen".