71999999999959 has 2 divisors, whose sum is σ = 71999999999960. Its totient is φ = 71999999999958.

The previous prime is 71999999999953. The next prime is 72000000000001. The reversal of 71999999999959 is 95999999999917.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71999999999959 - 2³ = 71999999999951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71999999999951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35999999999979 + 35999999999980.

It is an arithmetic number, because the mean of its divisors is an integer number (35999999999980).

Almost surely, 2^{71999999999959} is an apocalyptic number.

71999999999959 is a deficient number, since it is larger than the sum of its proper divisors (1).

71999999999959 is an equidigital number, since it uses as much as digits as its factorization.

71999999999959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1098337086315, while the sum is 112.

The spelling of 71999999999959 in words is "seventy-one trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty-nine".