68558479853 has 2 divisors, whose sum is σ = 68558479854. Its totient is φ = 68558479852.

The previous prime is 68558479813. The next prime is 68558479897. The reversal of 68558479853 is 35897485586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62218816969 + 6339662884 = 249437^2 + 79622^2 .

It is a cyclic number.

It is not a de Polignac number, because 68558479853 - 2¹² = 68558475757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68558479813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34279239926 + 34279239927.

It is an arithmetic number, because the mean of its divisors is an integer number (34279239927).

Almost surely, 2^68558479853 is an apocalyptic number.

It is an amenable number.

68558479853 is a deficient number, since it is larger than the sum of its proper divisors (1).

68558479853 is an equidigital number, since it uses as much as digits as its factorization.

68558479853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304000, while the sum is 68.

The spelling of 68558479853 in words is "sixty-eight billion, five hundred fifty-eight million, four hundred seventy-nine thousand, eight hundred fifty-three".