68532949691 has 2 divisors, whose sum is σ = 68532949692. Its totient is φ = 68532949690.

The previous prime is 68532949663. The next prime is 68532949729. The reversal of 68532949691 is 19694923586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68532949691 - 2⁶ = 68532949627 is a prime.

It is not a weakly prime, because it can be changed into another prime (68532949601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34266474845 + 34266474846.

It is an arithmetic number, because the mean of its divisors is an integer number (34266474846).

Almost surely, 2^68532949691 is an apocalyptic number.

68532949691 is a deficient number, since it is larger than the sum of its proper divisors (1).

68532949691 is an equidigital number, since it uses as much as digits as its factorization.

68532949691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25194240, while the sum is 62.

The spelling of 68532949691 in words is "sixty-eight billion, five hundred thirty-two million, nine hundred forty-nine thousand, six hundred ninety-one".