71631368069 has 2 divisors, whose sum is σ = 71631368070. Its totient is φ = 71631368068.

The previous prime is 71631368063. The next prime is 71631368101. The reversal of 71631368069 is 96086313617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71251624900 + 379743169 = 266930^2 + 19487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71631368069 is a prime.

It is a super-2 number, since 2×71631368069² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71631368063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35815684034 + 35815684035.

It is an arithmetic number, because the mean of its divisors is an integer number (35815684035).

Almost surely, 2^71631368069 is an apocalyptic number.

It is an amenable number.

71631368069 is a deficient number, since it is larger than the sum of its proper divisors (1).

71631368069 is an equidigital number, since it uses as much as digits as its factorization.

71631368069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 50.

The spelling of 71631368069 in words is "seventy-one billion, six hundred thirty-one million, three hundred sixty-eight thousand, sixty-nine".