68986801631249 has 2 divisors, whose sum is σ = 68986801631250. Its totient is φ = 68986801631248.

The previous prime is 68986801631207. The next prime is 68986801631347. The reversal of 68986801631249 is 94213610868986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50693944321024 + 18292857310225 = 7119968^2 + 4277015^2 .

It is a cyclic number.

It is not a de Polignac number, because 68986801631249 - 2¹² = 68986801627153 is a prime.

It is not a weakly prime, because it can be changed into another prime (68986801631849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34493400815624 + 34493400815625.

It is an arithmetic number, because the mean of its divisors is an integer number (34493400815625).

Almost surely, 2^{68986801631249} is an apocalyptic number.

It is an amenable number.

68986801631249 is a deficient number, since it is larger than the sum of its proper divisors (1).

68986801631249 is an equidigital number, since it uses as much as digits as its factorization.

68986801631249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 214990848, while the sum is 71.

The spelling of 68986801631249 in words is "sixty-eight trillion, nine hundred eighty-six billion, eight hundred one million, six hundred thirty-one thousand, two hundred forty-nine".