68936071307449 has 2 divisors, whose sum is σ = 68936071307450. Its totient is φ = 68936071307448.

The previous prime is 68936071307407. The next prime is 68936071307483. The reversal of 68936071307449 is 94470317063986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40687303395600 + 28248767911849 = 6378660^2 + 5314957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68936071307449 is a prime.

It is not a weakly prime, because it can be changed into another prime (68936071307149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34468035653724 + 34468035653725.

It is an arithmetic number, because the mean of its divisors is an integer number (34468035653725).

Almost surely, 2^{68936071307449} is an apocalyptic number.

It is an amenable number.

68936071307449 is a deficient number, since it is larger than the sum of its proper divisors (1).

68936071307449 is an equidigital number, since it uses as much as digits as its factorization.

68936071307449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164602368, while the sum is 67.

The spelling of 68936071307449 in words is "sixty-eight trillion, nine hundred thirty-six billion, seventy-one million, three hundred seven thousand, four hundred forty-nine".