256890092123 has 16 divisors (see below), whose sum is σ = 300784705536. Its totient is φ = 214795748160.

The previous prime is 256890092089. The next prime is 256890092141. The reversal of 256890092123 is 321290098652.

It is a de Polignac number, because none of the positive numbers 2^k-256890092123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256890092023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2633540 + ... + 2729342.

It is an arithmetic number, because the mean of its divisors is an integer number (18799044096).

Almost surely, 2^256890092123 is an apocalyptic number.

256890092123 is a deficient number, since it is larger than the sum of its proper divisors (43894613413).

256890092123 is an equidigital number, since it uses as much as digits as its factorization.

256890092123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105194.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 256890092123 in words is "two hundred fifty-six billion, eight hundred ninety million, ninety-two thousand, one hundred twenty-three".