256270667123 has 4 divisors (see below), whose sum is σ = 256278011880. Its totient is φ = 256263322368.

The previous prime is 256270667101. The next prime is 256270667173. The reversal of 256270667123 is 321766072652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256270667123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256270667173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3619790 + ... + 3689907.

It is an arithmetic number, because the mean of its divisors is an integer number (64069502970).

Almost surely, 2^256270667123 is an apocalyptic number.

256270667123 is a deficient number, since it is larger than the sum of its proper divisors (7344757).

256270667123 is an equidigital number, since it uses as much as digits as its factorization.

256270667123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7344756.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 256270667123 in words is "two hundred fifty-six billion, two hundred seventy million, six hundred sixty-seven thousand, one hundred twenty-three".