8185307982421 has 8 divisors (see below), whose sum is σ = 8319580485984. Its totient is φ = 8051038289520.

The previous prime is 8185307982367. The next prime is 8185307982427. The reversal of 8185307982421 is 1242897035818.

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

It is a cyclic number.

It is not a de Polignac number, because 8185307982421 - 2¹¹ = 8185307980373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8185307982427) 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, 5634510 + ... + 6936736.

It is an arithmetic number, because the mean of its divisors is an integer number (1039947560748).

Almost surely, 2^{8185307982421} is an apocalyptic number.

It is an amenable number.

8185307982421 is a deficient number, since it is larger than the sum of its proper divisors (134272503563).

8185307982421 is a wasteful number, since it uses less digits than its factorization.

8185307982421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405331.

The product of its (nonzero) digits is 7741440, while the sum is 58.

The spelling of 8185307982421 in words is "eight trillion, one hundred eighty-five billion, three hundred seven million, nine hundred eighty-two thousand, four hundred twenty-one".