1641639384162 has 18 divisors (see below), whose sum is σ = 3556897110273. Its totient is φ = 547211316072.

The previous prime is 1641639384127. The next prime is 1641639384181. The reversal of 1641639384162 is 2614839361461.

It is a happy number.

1641639384162 is a `hidden beast` number, since 1 + 6 + 4 + 16 + 393 + 84 + 162 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1355126481801 + 286512902361 = 1164099^2 + 535269^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=905991.

It is a junction number, because it is equal to n+sod(n) for n = 1641639384099 and 1641639384108.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5284948 + ... + 5586944.

Almost surely, 2^{1641639384162} is an apocalyptic number.

1641639384162 is an abundant number, since it is smaller than the sum of its proper divisors (1915257726111).

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

1641639384162 is an frugal number, since it uses more digits than its factorization.

1641639384162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604002 (or 302002 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The spelling of 1641639384162 in words is "one trillion, six hundred forty-one billion, six hundred thirty-nine million, three hundred eighty-four thousand, one hundred sixty-two".