398566179873 has 6 divisors (see below), whose sum is σ = 575706704274. Its totient is φ = 265710786576.

The previous prime is 398566179829. The next prime is 398566179911. The reversal of 398566179873 is 378971665893.

398566179873 is a `hidden beast` number, since 398 + 5 + 66 + 179 + 8 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 229203477504 + 169362702369 = 478752^2 + 411537^2 .

It is not a de Polignac number, because 398566179873 - 2¹⁰ = 398566178849 is a prime.

It is a super-2 number, since 2×398566179873² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398566179073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22142565540 + ... + 22142565557.

It is an arithmetic number, because the mean of its divisors is an integer number (95951117379).

Almost surely, 2^398566179873 is an apocalyptic number.

It is an amenable number.

398566179873 is a deficient number, since it is larger than the sum of its proper divisors (177140524401).

398566179873 is a wasteful number, since it uses less digits than its factorization.

398566179873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44285131103 (or 44285131100 counting only the distinct ones).

The product of its digits is 411505920, while the sum is 72.

The spelling of 398566179873 in words is "three hundred ninety-eight billion, five hundred sixty-six million, one hundred seventy-nine thousand, eight hundred seventy-three".