1684438171145 has 8 divisors (see below), whose sum is σ = 2021334563904. Its totient is φ = 1347544697904.

The previous prime is 1684438171139. The next prime is 1684438171159. The reversal of 1684438171145 is 5411718344861.

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 1684438171145 - 2¹⁸ = 1684437909001 is a prime.

It is a super-2 number, since 2×1684438171145² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850532 + ... + 2022938.

It is an arithmetic number, because the mean of its divisors is an integer number (252666820488).

Almost surely, 2^{1684438171145} is an apocalyptic number.

It is an amenable number.

1684438171145 is a deficient number, since it is larger than the sum of its proper divisors (336896392759).

1684438171145 is a wasteful number, since it uses less digits than its factorization.

1684438171145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459759.

The product of its digits is 2580480, while the sum is 53.

The spelling of 1684438171145 in words is "one trillion, six hundred eighty-four billion, four hundred thirty-eight million, one hundred seventy-one thousand, one hundred forty-five".