2001873287636 has 6 divisors (see below), whose sum is σ = 3503278253370. Its totient is φ = 1000936643816.

The previous prime is 2001873287629. The next prime is 2001873287647. The reversal of 2001873287636 is 6367823781002.

It can be written as a sum of positive squares in only one way, i.e., 1749286631236 + 252586656400 = 1322606^2 + 502580^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250234160951 + ... + 250234160958.

It is an arithmetic number, because the mean of its divisors is an integer number (583879708895).

Almost surely, 2^{2001873287636} is an apocalyptic number.

It is an amenable number.

2001873287636 is a deficient number, since it is larger than the sum of its proper divisors (1501404965734).

2001873287636 is a wasteful number, since it uses less digits than its factorization.

2001873287636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500468321913 (or 500468321911 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 2001873287636 in words is "two trillion, one billion, eight hundred seventy-three million, two hundred eighty-seven thousand, six hundred thirty-six".