68936071307381 has 2 divisors, whose sum is σ = 68936071307382. Its totient is φ = 68936071307380.

The previous prime is 68936071307353. The next prime is 68936071307407. The reversal of 68936071307381 is 18370317063986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40003613675281 + 28932457632100 = 6324841^2 + 5378890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68936071307381 is a prime.

It is a super-2 number, since 2×68936071307381² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68936071300381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34468035653690 + 34468035653691.

It is an arithmetic number, because the mean of its divisors is an integer number (34468035653691).

Almost surely, 2^{68936071307381} is an apocalyptic number.

It is an amenable number.

68936071307381 is a deficient number, since it is larger than the sum of its proper divisors (1).

68936071307381 is an equidigital number, since it uses as much as digits as its factorization.

68936071307381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27433728, while the sum is 62.

The spelling of 68936071307381 in words is "sixty-eight trillion, nine hundred thirty-six billion, seventy-one million, three hundred seven thousand, three hundred eighty-one".