71818138037 has 2 divisors, whose sum is σ = 71818138038. Its totient is φ = 71818138036.

The previous prime is 71818137977. The next prime is 71818138081. The reversal of 71818138037 is 73083181817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71499551236 + 318586801 = 267394^2 + 17849^2 .

It is a cyclic number.

It is not a de Polignac number, because 71818138037 - 2¹⁴ = 71818121653 is a prime.

It is a super-2 number, since 2×71818138037² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71818137982 and 71818138000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71818338037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35909069018 + 35909069019.

It is an arithmetic number, because the mean of its divisors is an integer number (35909069019).

Almost surely, 2^71818138037 is an apocalyptic number.

It is an amenable number.

71818138037 is a deficient number, since it is larger than the sum of its proper divisors (1).

71818138037 is an equidigital number, since it uses as much as digits as its factorization.

71818138037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 47.

The spelling of 71818138037 in words is "seventy-one billion, eight hundred eighteen million, one hundred thirty-eight thousand, thirty-seven".