2001289881042 has 80 divisors (see below), whose sum is σ = 4668554804760. Its totient is φ = 639990554112.

The previous prime is 2001289881023. The next prime is 2001289881047. The reversal of 2001289881042 is 2401889821002.

It can be written as a sum of positive squares in 4 ways, for example, as 1101977162001 + 899312719041 = 1049751^2 + 948321^2 .

It is a super-2 number, since 2×2001289881042² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2001289881047) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 619063 + ... + 2094234.

Almost surely, 2^{2001289881042} is an apocalyptic number.

2001289881042 is an abundant number, since it is smaller than the sum of its proper divisors (2667264923718).

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

2001289881042 is a wasteful number, since it uses less digits than its factorization.

2001289881042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2713497 (or 2713488 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The spelling of 2001289881042 in words is "two trillion, one billion, two hundred eighty-nine million, eight hundred eighty-one thousand, forty-two".