68561159 has 2 divisors, whose sum is σ = 68561160. Its totient is φ = 68561158.

The previous prime is 68561149. The next prime is 68561173. The reversal of 68561159 is 95116586.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68561159 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68561149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34280579 + 34280580.

It is an arithmetic number, because the mean of its divisors is an integer number (34280580).

Almost surely, 2^68561159 is an apocalyptic number.

68561159 is a deficient number, since it is larger than the sum of its proper divisors (1).

68561159 is an equidigital number, since it uses as much as digits as its factorization.

68561159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 41.

The square root of 68561159 is about 8280.1666046040. The cubic root of 68561159 is about 409.2852090543.

The spelling of 68561159 in words is "sixty-eight million, five hundred sixty-one thousand, one hundred fifty-nine".