543112661556 has 72 divisors (see below), whose sum is σ = 1491741305600. Its totient is φ = 165976698240.

The previous prime is 543112661503. The next prime is 543112661629. The reversal of 543112661556 is 655166211345.

543112661556 is a `hidden beast` number, since 5 + 4 + 3 + 1 + 1 + 26 + 615 + 5 + 6 = 666.

It is a super-2 number, since 2×543112661556² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12785641 + ... + 12828048.

Almost surely, 2^543112661556 is an apocalyptic number.

It is an amenable number.

543112661556 is an abundant number, since it is smaller than the sum of its proper divisors (948628644044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

543112661556 is a wasteful number, since it uses less digits than its factorization.

543112661556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25613749 (or 25613744 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The spelling of 543112661556 in words is "five hundred forty-three billion, one hundred twelve million, six hundred sixty-one thousand, five hundred fifty-six".