1641239169966 has 24 divisors (see below), whose sum is σ = 3879292584024. Its totient is φ = 497345202960.

The previous prime is 1641239169959. The next prime is 1641239169967. The reversal of 1641239169966 is 6699619321461.

1641239169966 is a `hidden beast` number, since 16 + 412 + 3 + 91 + 69 + 9 + 66 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641239169967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4144543161 + ... + 4144543556.

It is an arithmetic number, because the mean of its divisors is an integer number (161637191001).

Almost surely, 2^{1641239169966} is an apocalyptic number.

1641239169966 is an abundant number, since it is smaller than the sum of its proper divisors (2238053414058).

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

1641239169966 is a wasteful number, since it uses less digits than its factorization.

1641239169966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8289086736 (or 8289086733 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 63.

The spelling of 1641239169966 in words is "one trillion, six hundred forty-one billion, two hundred thirty-nine million, one hundred sixty-nine thousand, nine hundred sixty-six".