8158976824421 has 4 divisors (see below), whose sum is σ = 8158982980512. Its totient is φ = 8158970668332.

The previous prime is 8158976824391. The next prime is 8158976824477. The reversal of 8158976824421 is 1244286798518.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8158976824421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8158976823421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181331 + ... + 4043616.

It is an arithmetic number, because the mean of its divisors is an integer number (2039745745128).

Almost surely, 2^{8158976824421} is an apocalyptic number.

It is an amenable number.

8158976824421 is a deficient number, since it is larger than the sum of its proper divisors (6156091).

8158976824421 is a wasteful number, since it uses less digits than its factorization.

8158976824421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6156090.

The product of its digits is 61931520, while the sum is 65.

The spelling of 8158976824421 in words is "eight trillion, one hundred fifty-eight billion, nine hundred seventy-six million, eight hundred twenty-four thousand, four hundred twenty-one".