56531413566 has 192 divisors, whose sum is σ = 134131286016. Its totient is φ = 17822592000.

The previous prime is 56531413559. The next prime is 56531413567. The reversal of 56531413566 is 66531413565.

It is a happy number.

56531413566 is a `hidden beast` number, since 5 + 65 + 3 + 14 + 13 + 566 = 666.

56531413566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56531413567) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 147601411 + ... + 147601793.

It is an arithmetic number, because the mean of its divisors is an integer number (698600448).

Almost surely, 2^56531413566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56531413566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67065643008).

56531413566 is an abundant number, since it is smaller than the sum of its proper divisors (77599872450).

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

56531413566 is a wasteful number, since it uses less digits than its factorization.

56531413566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 617 counting only the distinct ones).

The product of its digits is 972000, while the sum is 45.

Subtracting 56531413566 from its reverse (66531413565), we obtain a palindrome (9999999999).

The spelling of 56531413566 in words is "fifty-six billion, five hundred thirty-one million, four hundred thirteen thousand, five hundred sixty-six".