2001881782873 has 4 divisors (see below), whose sum is σ = 2287864894720. Its totient is φ = 1715898671028.

The previous prime is 2001881782871. The next prime is 2001881782877. The reversal of 2001881782873 is 3782871881002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2001881782873 - 2¹ = 2001881782871 is a prime.

It is a super-2 number, since 2×2001881782873² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001881782871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142991555913 + ... + 142991555926.

It is an arithmetic number, because the mean of its divisors is an integer number (571966223680).

Almost surely, 2^{2001881782873} is an apocalyptic number.

It is an amenable number.

2001881782873 is a deficient number, since it is larger than the sum of its proper divisors (285983111847).

2001881782873 is an equidigital number, since it uses as much as digits as its factorization.

2001881782873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285983111846.

The product of its (nonzero) digits is 2408448, while the sum is 55.

The spelling of 2001881782873 in words is "two trillion, one billion, eight hundred eighty-one million, seven hundred eighty-two thousand, eight hundred seventy-three".