256207266123 has 8 divisors (see below), whose sum is σ = 342525533328. Its totient is φ = 170346921504.

The previous prime is 256207266041. The next prime is 256207266143. The reversal of 256207266123 is 321662702652.

It is a happy number.

256207266123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256207266123 - 2²⁵ = 256173711691 is a prime.

It is a super-2 number, since 2×256207266123² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256207266143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114479340 + ... + 114481577.

It is an arithmetic number, because the mean of its divisors is an integer number (42815691666).

Almost surely, 2^256207266123 is an apocalyptic number.

256207266123 is a deficient number, since it is larger than the sum of its proper divisors (86318267205).

256207266123 is a wasteful number, since it uses less digits than its factorization.

256207266123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228961293.

The product of its (nonzero) digits is 362880, while the sum is 42.

Adding to 256207266123 its reverse (321662702652), we get a palindrome (577869968775).

The spelling of 256207266123 in words is "two hundred fifty-six billion, two hundred seven million, two hundred sixty-six thousand, one hundred twenty-three".