8381774405421 has 24 divisors (see below), whose sum is σ = 12189364826496. Its totient is φ = 5549851749600.

The previous prime is 8381774405413. The next prime is 8381774405423. The reversal of 8381774405421 is 1245044771838.

8381774405421 is a `hidden beast` number, since 8 + 3 + 8 + 177 + 4 + 40 + 5 + 421 = 666.

It is not a de Polignac number, because 8381774405421 - 2³ = 8381774405413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8381774405423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7093231 + ... + 8190083.

It is an arithmetic number, because the mean of its divisors is an integer number (507890201104).

Almost surely, 2^{8381774405421} is an apocalyptic number.

It is an amenable number.

8381774405421 is a deficient number, since it is larger than the sum of its proper divisors (3807590421075).

8381774405421 is a wasteful number, since it uses less digits than its factorization.

8381774405421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102633 (or 1102630 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 54.

The spelling of 8381774405421 in words is "eight trillion, three hundred eighty-one billion, seven hundred seventy-four million, four hundred five thousand, four hundred twenty-one".