2161799809594 has 8 divisors (see below), whose sum is σ = 3433446756468. Its totient is φ = 1017317557440.

The previous prime is 2161799809571. The next prime is 2161799809607. The reversal of 2161799809594 is 4959089971612.

It can be written as a sum of positive squares in 2 ways, for example, as 2077504236025 + 84295573569 = 1441355^2 + 290337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31791173637 + ... + 31791173704.

Almost surely, 2^{2161799809594} is an apocalyptic number.

2161799809594 is a deficient number, since it is larger than the sum of its proper divisors (1271646946874).

2161799809594 is a wasteful number, since it uses less digits than its factorization.

2161799809594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63582347360.

The product of its (nonzero) digits is 88179840, while the sum is 70.

The spelling of 2161799809594 in words is "two trillion, one hundred sixty-one billion, seven hundred ninety-nine million, eight hundred nine thousand, five hundred ninety-four".