561342163138672 has 20 divisors (see below), whose sum is σ = 1087637600772280. Its totient is φ = 280661491971648.

The previous prime is 561342163138651. The next prime is 561342163138697. The reversal of 561342163138672 is 276831361243165.

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, 598866918 + ... + 599803525.

It is an arithmetic number, because the mean of its divisors is an integer number (54381880038614).

Almost surely, 2^{561342163138672} is an apocalyptic number.

It is an amenable number.

561342163138672 is a deficient number, since it is larger than the sum of its proper divisors (526295437633608).

561342163138672 is a wasteful number, since it uses less digits than its factorization.

561342163138672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198699720 (or 1198699714 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 58.

The spelling of 561342163138672 in words is "five hundred sixty-one trillion, three hundred forty-two billion, one hundred sixty-three million, one hundred thirty-eight thousand, six hundred seventy-two".