521984198166 has 16 divisors (see below), whose sum is σ = 1044395057664. Its totient is φ = 173923622504.

The previous prime is 521984198137. The next prime is 521984198189. The reversal of 521984198166 is 661891489125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17761650 + ... + 17791013.

It is an arithmetic number, because the mean of its divisors is an integer number (65274691104).

Almost surely, 2^521984198166 is an apocalyptic number.

521984198166 is an abundant number, since it is smaller than the sum of its proper divisors (522410859498).

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

521984198166 is a wasteful number, since it uses less digits than its factorization.

521984198166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35555115.

The product of its digits is 7464960, while the sum is 60.

The spelling of 521984198166 in words is "five hundred twenty-one billion, nine hundred eighty-four million, one hundred ninety-eight thousand, one hundred sixty-six".