2006642868281 has 4 divisors (see below), whose sum is σ = 2006888577792. Its totient is φ = 2006397158772.

The previous prime is 2006642868253. The next prime is 2006642868283. The reversal of 2006642868281 is 1828682466002.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-2006642868281 is a prime.

It is a super-2 number, since 2×2006642868281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2006642868283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122842505 + ... + 122858838.

It is an arithmetic number, because the mean of its divisors is an integer number (501722144448).

Almost surely, 2^{2006642868281} is an apocalyptic number.

It is an amenable number.

2006642868281 is a deficient number, since it is larger than the sum of its proper divisors (245709511).

2006642868281 is an equidigital number, since it uses as much as digits as its factorization.

2006642868281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245709510.

The product of its (nonzero) digits is 3538944, while the sum is 53.

The spelling of 2006642868281 in words is "two trillion, six billion, six hundred forty-two million, eight hundred sixty-eight thousand, two hundred eighty-one".