56543634571 has 2 divisors, whose sum is σ = 56543634572. Its totient is φ = 56543634570.

The previous prime is 56543634559. The next prime is 56543634647. The reversal of 56543634571 is 17543634565.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56543634571 is a prime.

It is a super-2 number, since 2×56543634571² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56543634671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28271817285 + 28271817286.

It is an arithmetic number, because the mean of its divisors is an integer number (28271817286).

Almost surely, 2^56543634571 is an apocalyptic number.

56543634571 is a deficient number, since it is larger than the sum of its proper divisors (1).

56543634571 is an equidigital number, since it uses as much as digits as its factorization.

56543634571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536000, while the sum is 49.

The spelling of 56543634571 in words is "fifty-six billion, five hundred forty-three million, six hundred thirty-four thousand, five hundred seventy-one".