256412004623 has 4 divisors (see below), whose sum is σ = 263342058840. Its totient is φ = 249481950408.

The previous prime is 256412004617. The next prime is 256412004631. The reversal of 256412004623 is 326400214652.

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

It is a cyclic number.

It is not a de Polignac number, because 256412004623 - 2¹⁰ = 256412003599 is a prime.

It is a super-2 number, since 2×256412004623² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256412004223) 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, 3465027053 + ... + 3465027126.

It is an arithmetic number, because the mean of its divisors is an integer number (65835514710).

Almost surely, 2^256412004623 is an apocalyptic number.

256412004623 is a deficient number, since it is larger than the sum of its proper divisors (6930054217).

256412004623 is an equidigital number, since it uses as much as digits as its factorization.

256412004623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6930054216.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 256412004623 in words is "two hundred fifty-six billion, four hundred twelve million, four thousand, six hundred twenty-three".