71507567137 has 2 divisors, whose sum is σ = 71507567138. Its totient is φ = 71507567136.

The previous prime is 71507567119. The next prime is 71507567141. The reversal of 71507567137 is 73176570517.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64000904256 + 7506662881 = 252984^2 + 86641^2 .

It is an emirp because it is prime and its reverse (73176570517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71507567137 - 2¹¹ = 71507565089 is a prime.

It is a super-2 number, since 2×71507567137² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71507564137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35753783568 + 35753783569.

It is an arithmetic number, because the mean of its divisors is an integer number (35753783569).

Almost surely, 2^71507567137 is an apocalyptic number.

It is an amenable number.

71507567137 is a deficient number, since it is larger than the sum of its proper divisors (1).

71507567137 is an equidigital number, since it uses as much as digits as its factorization.

71507567137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080450, while the sum is 49.

The spelling of 71507567137 in words is "seventy-one billion, five hundred seven million, five hundred sixty-seven thousand, one hundred thirty-seven".