71631273667 has 2 divisors, whose sum is σ = 71631273668. Its totient is φ = 71631273666.

The previous prime is 71631273643. The next prime is 71631273689. The reversal of 71631273667 is 76637213617.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71631273667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71631273667.

It is not a weakly prime, because it can be changed into another prime (71631279667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35815636833 + 35815636834.

It is an arithmetic number, because the mean of its divisors is an integer number (35815636834).

Almost surely, 2^71631273667 is an apocalyptic number.

71631273667 is a deficient number, since it is larger than the sum of its proper divisors (1).

71631273667 is an equidigital number, since it uses as much as digits as its factorization.

71631273667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 49.

The spelling of 71631273667 in words is "seventy-one billion, six hundred thirty-one million, two hundred seventy-three thousand, six hundred sixty-seven".