256402412405 has 8 divisors (see below), whose sum is σ = 309570520992. Its totient is φ = 203863512528.

The previous prime is 256402412401. The next prime is 256402412411. The reversal of 256402412405 is 504214204652.

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 256402412405 - 2² = 256402412401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256402412401) 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, 157301279 + ... + 157302908.

It is an arithmetic number, because the mean of its divisors is an integer number (38696315124).

Almost surely, 2^256402412405 is an apocalyptic number.

It is an amenable number.

256402412405 is a deficient number, since it is larger than the sum of its proper divisors (53168108587).

256402412405 is a wasteful number, since it uses less digits than its factorization.

256402412405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314604355.

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 256402412405 in words is "two hundred fifty-six billion, four hundred two million, four hundred twelve thousand, four hundred five".