971161217615 has 4 divisors (see below), whose sum is σ = 1165393461144. Its totient is φ = 776928974088.

The previous prime is 971161217591. The next prime is 971161217659. The reversal of 971161217615 is 516712161179.

971161217615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 971161217615 - 2¹⁰ = 971161216591 is a prime.

It is a super-2 number, since 2×971161217615² (a number of 25 digits) contains 22 as substring.

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 971161217615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97116121757 + ... + 97116121766.

It is an arithmetic number, because the mean of its divisors is an integer number (291348365286).

Almost surely, 2^971161217615 is an apocalyptic number.

971161217615 is a deficient number, since it is larger than the sum of its proper divisors (194232243529).

971161217615 is a wasteful number, since it uses less digits than its factorization.

971161217615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194232243528.

The product of its digits is 158760, while the sum is 47.

The spelling of 971161217615 in words is "nine hundred seventy-one billion, one hundred sixty-one million, two hundred seventeen thousand, six hundred fifteen".