68520019543 has 2 divisors, whose sum is σ = 68520019544. Its totient is φ = 68520019542.

The previous prime is 68520019507. The next prime is 68520019573. The reversal of 68520019543 is 34591002586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68520019543 - 2¹⁷ = 68519888471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68520019543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68520019573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34260009771 + 34260009772.

It is an arithmetic number, because the mean of its divisors is an integer number (34260009772).

Almost surely, 2^68520019543 is an apocalyptic number.

68520019543 is a deficient number, since it is larger than the sum of its proper divisors (1).

68520019543 is an equidigital number, since it uses as much as digits as its factorization.

68520019543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 68520019543 in words is "sixty-eight billion, five hundred twenty million, nineteen thousand, five hundred forty-three".