256507205624123 has 8 divisors (see below), whose sum is σ = 256925115291456. Its totient is φ = 256089635310600.

The previous prime is 256507205624107. The next prime is 256507205624149. The reversal of 256507205624123 is 321426502705652.

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

It is a cyclic number.

It is not a de Polignac number, because 256507205624123 - 2⁴ = 256507205624107 is a prime.

It is a super-2 number, since 2×256507205624123² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256507205624323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83325461 + ... + 86348982.

It is an arithmetic number, because the mean of its divisors is an integer number (32115639411432).

Almost surely, 2^{256507205624123} is an apocalyptic number.

256507205624123 is a deficient number, since it is larger than the sum of its proper divisors (417909667333).

256507205624123 is a wasteful number, since it uses less digits than its factorization.

256507205624123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169676905.

The product of its (nonzero) digits is 6048000, while the sum is 50.

The spelling of 256507205624123 in words is "two hundred fifty-six trillion, five hundred seven billion, two hundred five million, six hundred twenty-four thousand, one hundred twenty-three".