8971632917421 has 8 divisors (see below), whose sum is σ = 11962197240864. Its totient is φ = 5981078602800.

The previous prime is 8971632917369. The next prime is 8971632917437. The reversal of 8971632917421 is 1247192361798.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8971632917421 - 2⁷ = 8971632917293 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8971632917491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74055 + ... + 4236596.

It is an arithmetic number, because the mean of its divisors is an integer number (1495274655108).

Almost surely, 2^{8971632917421} is an apocalyptic number.

It is an amenable number.

8971632917421 is a deficient number, since it is larger than the sum of its proper divisors (2990564323443).

8971632917421 is a wasteful number, since it uses less digits than its factorization.

8971632917421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004411.

The product of its digits is 9144576, while the sum is 60.

The spelling of 8971632917421 in words is "eight trillion, nine hundred seventy-one billion, six hundred thirty-two million, nine hundred seventeen thousand, four hundred twenty-one".