256647446816612 has 12 divisors (see below), whose sum is σ = 449783007378096. Its totient is φ = 128138016137160.

The previous prime is 256647446816521. The next prime is 256647446816617. The reversal of 256647446816612 is 216618644746652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (256647446816617) 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, 46426814678 + ... + 46426820205.

It is an arithmetic number, because the mean of its divisors is an integer number (37481917281508).

Almost surely, 2^{256647446816612} is an apocalyptic number.

It is an amenable number.

256647446816612 is a deficient number, since it is larger than the sum of its proper divisors (193135560561484).

256647446816612 is a wasteful number, since it uses less digits than its factorization.

256647446816612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92853635578 (or 92853635576 counting only the distinct ones).

The product of its digits is 557383680, while the sum is 68.

The spelling of 256647446816612 in words is "two hundred fifty-six trillion, six hundred forty-seven billion, four hundred forty-six million, eight hundred sixteen thousand, six hundred twelve".