8381187689672 has 36 divisors (see below), whose sum is σ = 18280521638865. Its totient is φ = 3591913016160.

The previous prime is 8381187689671. The next prime is 8381187689681. The reversal of 8381187689672 is 2769867811838.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 8112733137796 + 268454551876 = 2848286^2 + 518126^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2047094.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8381187689672.

It is not an unprimeable number, because it can be changed into a prime (8381187689671) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 57245522 + ... + 57391742.

Almost surely, 2^{8381187689672} is an apocalyptic number.

It is an amenable number.

8381187689672 is an abundant number, since it is smaller than the sum of its proper divisors (9899333949193).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8381187689672 is an frugal number, since it uses more digits than its factorization.

8381187689672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292462 (or 146230 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 74.

The spelling of 8381187689672 in words is "eight trillion, three hundred eighty-one billion, one hundred eighty-seven million, six hundred eighty-nine thousand, six hundred seventy-two".