2001991902002 has 8 divisors (see below), whose sum is σ = 3133552542336. Its totient is φ = 957474387892.

The previous prime is 2001991901977. The next prime is 2001991902013. The reversal of 2001991902002 is 2002091991002.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21760781498 + ... + 21760781589.

It is an arithmetic number, because the mean of its divisors is an integer number (391694067792).

Almost surely, 2^{2001991902002} is an apocalyptic number.

2001991902002 is a deficient number, since it is larger than the sum of its proper divisors (1131560640334).

2001991902002 is a wasteful number, since it uses less digits than its factorization.

2001991902002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43521563112.

The product of its (nonzero) digits is 5832, while the sum is 35.

The spelling of 2001991902002 in words is "two trillion, one billion, nine hundred ninety-one million, nine hundred two thousand, two".