71732857213 has 2 divisors, whose sum is σ = 71732857214. Its totient is φ = 71732857212.

The previous prime is 71732857193. The next prime is 71732857271. The reversal of 71732857213 is 31275823717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71493133924 + 239723289 = 267382^2 + 15483^2 .

It is a cyclic number.

It is not a de Polignac number, because 71732857213 - 2²¹ = 71730760061 is a prime.

It is a super-2 number, since 2×71732857213² (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 (71732857283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35866428606 + 35866428607.

It is an arithmetic number, because the mean of its divisors is an integer number (35866428607).

Almost surely, 2^71732857213 is an apocalyptic number.

It is an amenable number.

71732857213 is a deficient number, since it is larger than the sum of its proper divisors (1).

71732857213 is an equidigital number, since it uses as much as digits as its factorization.

71732857213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493920, while the sum is 46.

The spelling of 71732857213 in words is "seventy-one billion, seven hundred thirty-two million, eight hundred fifty-seven thousand, two hundred thirteen".