68812515041 has 2 divisors, whose sum is σ = 68812515042. Its totient is φ = 68812515040.

The previous prime is 68812515007. The next prime is 68812515043. The reversal of 68812515041 is 14051521886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43899049441 + 24913465600 = 209521^2 + 157840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68812515041 is a prime.

It is a Sophie Germain prime.

Together with 68812515043, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68812515041.

It is not a weakly prime, because it can be changed into another prime (68812515043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34406257520 + 34406257521.

It is an arithmetic number, because the mean of its divisors is an integer number (34406257521).

Almost surely, 2^68812515041 is an apocalyptic number.

It is an amenable number.

68812515041 is a deficient number, since it is larger than the sum of its proper divisors (1).

68812515041 is an equidigital number, since it uses as much as digits as its factorization.

68812515041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76800, while the sum is 41.

The spelling of 68812515041 in words is "sixty-eight billion, eight hundred twelve million, five hundred fifteen thousand, forty-one".