71338762681 has 2 divisors, whose sum is σ = 71338762682. Its totient is φ = 71338762680.

The previous prime is 71338762643. The next prime is 71338762697. The reversal of 71338762681 is 18626783317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37357158400 + 33981604281 = 193280^2 + 184341^2 .

It is a cyclic number.

It is not a de Polignac number, because 71338762681 - 2¹⁹ = 71338238393 is a prime.

It is a super-2 number, since 2×71338762681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71338762631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35669381340 + 35669381341.

It is an arithmetic number, because the mean of its divisors is an integer number (35669381341).

Almost surely, 2^71338762681 is an apocalyptic number.

It is an amenable number.

71338762681 is a deficient number, since it is larger than the sum of its proper divisors (1).

71338762681 is an equidigital number, since it uses as much as digits as its factorization.

71338762681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 52.

The spelling of 71338762681 in words is "seventy-one billion, three hundred thirty-eight million, seven hundred sixty-two thousand, six hundred eighty-one".