71945138327 has 2 divisors, whose sum is σ = 71945138328. Its totient is φ = 71945138326.

The previous prime is 71945138261. The next prime is 71945138359. The reversal of 71945138327 is 72383154917.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71945138327 is a prime.

It is a super-2 number, since 2×71945138327² (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 (71945108327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35972569163 + 35972569164.

It is an arithmetic number, because the mean of its divisors is an integer number (35972569164).

Almost surely, 2^71945138327 is an apocalyptic number.

71945138327 is a deficient number, since it is larger than the sum of its proper divisors (1).

71945138327 is an equidigital number, since it uses as much as digits as its factorization.

71945138327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The spelling of 71945138327 in words is "seventy-one billion, nine hundred forty-five million, one hundred thirty-eight thousand, three hundred twenty-seven".