256621045145116 has 48 divisors (see below), whose sum is σ = 459029678184000. Its totient is φ = 125485508109312.

The previous prime is 256621045145081. The next prime is 256621045145161. The reversal of 256621045145116 is 611541540126652.

It is a super-3 number, since 3×256621045145116³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 256621045145116.

It is a congruent number.

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, 214189780 + ... + 215384548.

It is an arithmetic number, because the mean of its divisors is an integer number (9563118295500).

Almost surely, 2^{256621045145116} is an apocalyptic number.

It is an amenable number.

256621045145116 is a deficient number, since it is larger than the sum of its proper divisors (202408633038884).

256621045145116 is a wasteful number, since it uses less digits than its factorization.

256621045145116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198078 (or 1198076 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 49.

The spelling of 256621045145116 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, forty-five million, one hundred forty-five thousand, one hundred sixteen".