71500656641 has 2 divisors, whose sum is σ = 71500656642. Its totient is φ = 71500656640.

The previous prime is 71500656533. The next prime is 71500656653. The reversal of 71500656641 is 14665600517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48602611600 + 22898045041 = 220460^2 + 151321^2 .

It is an emirp because it is prime and its reverse (14665600517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71500656641 - 2¹⁴ = 71500640257 is a prime.

It is a super-2 number, since 2×71500656641² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71500656041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35750328320 + 35750328321.

It is an arithmetic number, because the mean of its divisors is an integer number (35750328321).

Almost surely, 2^71500656641 is an apocalyptic number.

It is an amenable number.

71500656641 is a deficient number, since it is larger than the sum of its proper divisors (1).

71500656641 is an equidigital number, since it uses as much as digits as its factorization.

71500656641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 71500656641 in words is "seventy-one billion, five hundred million, six hundred fifty-six thousand, six hundred forty-one".