561265218646168 has 16 divisors (see below), whose sum is σ = 1053964376174160. Its totient is φ = 280208051666400.

The previous prime is 561265218646109. The next prime is 561265218646189. The reversal of 561265218646168 is 861646812562165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53069701468 + ... + 53069712043.

It is an arithmetic number, because the mean of its divisors is an integer number (65872773510885).

Almost surely, 2^{561265218646168} is an apocalyptic number.

It is an amenable number.

561265218646168 is a deficient number, since it is larger than the sum of its proper divisors (492699157527992).

561265218646168 is a wasteful number, since it uses less digits than its factorization.

561265218646168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106139414178 (or 106139414174 counting only the distinct ones).

The product of its digits is 199065600, while the sum is 67.

The spelling of 561265218646168 in words is "five hundred sixty-one trillion, two hundred sixty-five billion, two hundred eighteen million, six hundred forty-six thousand, one hundred sixty-eight".