61568818543 has 2 divisors, whose sum is σ = 61568818544. Its totient is φ = 61568818542.

The previous prime is 61568818517. The next prime is 61568818547. The reversal of 61568818543 is 34581886516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61568818543 - 2¹⁷ = 61568687471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61568818547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30784409271 + 30784409272.

It is an arithmetic number, because the mean of its divisors is an integer number (30784409272).

Almost surely, 2^61568818543 is an apocalyptic number.

61568818543 is a deficient number, since it is larger than the sum of its proper divisors (1).

61568818543 is an equidigital number, since it uses as much as digits as its factorization.

61568818543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5529600, while the sum is 55.

The spelling of 61568818543 in words is "sixty-one billion, five hundred sixty-eight million, eight hundred eighteen thousand, five hundred forty-three".