971999999999959 has 4 divisors (see below), whose sum is σ = 1110857142857104. Its totient is φ = 833142857142816.

The previous prime is 971999999999891. The next prime is 971999999999981. The reversal of 971999999999959 is 959999999999179.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 971999999999959 - 2³¹ = 971997852516311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 971999999999959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971999999999999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69428571428562 + ... + 69428571428575.

It is an arithmetic number, because the mean of its divisors is an integer number (277714285714276).

Almost surely, 2^{971999999999959} is an apocalyptic number.

971999999999959 is a deficient number, since it is larger than the sum of its proper divisors (138857142857145).

971999999999959 is a wasteful number, since it uses less digits than its factorization.

971999999999959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138857142857144.

The product of its digits is 9885033776835, while the sum is 121.

The spelling of 971999999999959 in words is "nine hundred seventy-one trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty-nine".