256207266122 has 8 divisors (see below), whose sum is σ = 394697680356. Its totient is φ = 124641372672.

The previous prime is 256207266041. The next prime is 256207266143. The reversal of 256207266122 is 221662702652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 242655745201 + 13551520921 = 492601^2 + 116411^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 256207266122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1731130103 + ... + 1731130250.

Almost surely, 2^256207266122 is an apocalyptic number.

256207266122 is a deficient number, since it is larger than the sum of its proper divisors (138490414234).

256207266122 is a wasteful number, since it uses less digits than its factorization.

256207266122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462260392.

The product of its (nonzero) digits is 241920, while the sum is 41.

Adding to 256207266122 its reverse (221662702652), we get a palindrome (477869968774).

The spelling of 256207266122 in words is "two hundred fifty-six billion, two hundred seven million, two hundred sixty-six thousand, one hundred twenty-two".