71694875531 has 2 divisors, whose sum is σ = 71694875532. Its totient is φ = 71694875530.

The previous prime is 71694875521. The next prime is 71694875587. The reversal of 71694875531 is 13557849617.

It is a happy number.

It is an a-pointer prime, because the next prime (71694875587) can be obtained adding 71694875531 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71694875531 is a prime.

It is a super-2 number, since 2×71694875531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71694875521) 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, 35847437765 + 35847437766.

It is an arithmetic number, because the mean of its divisors is an integer number (35847437766).

Almost surely, 2^71694875531 is an apocalyptic number.

71694875531 is a deficient number, since it is larger than the sum of its proper divisors (1).

71694875531 is an equidigital number, since it uses as much as digits as its factorization.

71694875531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6350400, while the sum is 56.

The spelling of 71694875531 in words is "seventy-one billion, six hundred ninety-four million, eight hundred seventy-five thousand, five hundred thirty-one".