68616878653 has 2 divisors, whose sum is σ = 68616878654. Its totient is φ = 68616878652.

The previous prime is 68616878587. The next prime is 68616878657. The reversal of 68616878653 is 35687861686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67413968164 + 1202910489 = 259642^2 + 34683^2 .

It is a cyclic number.

It is not a de Polignac number, because 68616878653 - 2¹³ = 68616870461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68616878657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34308439326 + 34308439327.

It is an arithmetic number, because the mean of its divisors is an integer number (34308439327).

Almost surely, 2^68616878653 is an apocalyptic number.

It is an amenable number.

68616878653 is a deficient number, since it is larger than the sum of its proper divisors (1).

68616878653 is an equidigital number, since it uses as much as digits as its factorization.

68616878653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69672960, while the sum is 64.

The spelling of 68616878653 in words is "sixty-eight billion, six hundred sixteen million, eight hundred seventy-eight thousand, six hundred fifty-three".