972648559871 has 4 divisors (see below), whose sum is σ = 973472141544. Its totient is φ = 971824978200.

The previous prime is 972648559793. The next prime is 972648559891. The reversal of 972648559871 is 178955846279.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972648559871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 972648559795 and 972648559804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972648559891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411789065 + ... + 411791426.

It is an arithmetic number, because the mean of its divisors is an integer number (243368035386).

Almost surely, 2^972648559871 is an apocalyptic number.

972648559871 is a deficient number, since it is larger than the sum of its proper divisors (823581673).

972648559871 is a wasteful number, since it uses less digits than its factorization.

972648559871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823581672.

The product of its digits is 304819200, while the sum is 71.

The spelling of 972648559871 in words is "nine hundred seventy-two billion, six hundred forty-eight million, five hundred fifty-nine thousand, eight hundred seventy-one".