84171667381 has 8 divisors (see below), whose sum is σ = 88373754720. Its totient is φ = 80056221168.

The previous prime is 84171667357. The next prime is 84171667403. The reversal of 84171667381 is 18376617148.

It is a happy number.

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 84171667381 - 2⁷ = 84171667253 is a prime.

It is a super-2 number, since 2×84171667381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84171667301) 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, 21658291 + ... + 21662176.

It is an arithmetic number, because the mean of its divisors is an integer number (11046719340).

Almost surely, 2^84171667381 is an apocalyptic number.

It is an amenable number.

84171667381 is a deficient number, since it is larger than the sum of its proper divisors (4202087339).

84171667381 is a wasteful number, since it uses less digits than its factorization.

84171667381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43320563.

The product of its digits is 1354752, while the sum is 52.

The spelling of 84171667381 in words is "eighty-four billion, one hundred seventy-one million, six hundred sixty-seven thousand, three hundred eighty-one".