256418746418 has 4 divisors (see below), whose sum is σ = 384628119630. Its totient is φ = 128209373208.

The previous prime is 256418746403. The next prime is 256418746429. The reversal of 256418746418 is 814647814652.

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

It can be written as a sum of positive squares in only one way, i.e., 134368432969 + 122050313449 = 366563^2 + 349357^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64104686603 + ... + 64104686606.

Almost surely, 2^256418746418 is an apocalyptic number.

256418746418 is a deficient number, since it is larger than the sum of its proper divisors (128209373212).

256418746418 is a wasteful number, since it uses less digits than its factorization.

256418746418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128209373211.

The product of its digits is 10321920, while the sum is 56.

The spelling of 256418746418 in words is "two hundred fifty-six billion, four hundred eighteen million, seven hundred forty-six thousand, four hundred eighteen".