2684871528081 has 4 divisors (see below), whose sum is σ = 3579828704112. Its totient is φ = 1789914352052.

The previous prime is 2684871528013. The next prime is 2684871528139. The reversal of 2684871528081 is 1808251784862.

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 not a de Polignac number, because 2684871528081 - 2³⁸ = 2409993621137 is a prime.

It is a super-2 number, since 2×2684871528081² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2684871528281) 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, 447478588011 + ... + 447478588016.

It is an arithmetic number, because the mean of its divisors is an integer number (894957176028).

Almost surely, 2^{2684871528081} is an apocalyptic number.

It is an amenable number.

2684871528081 is a deficient number, since it is larger than the sum of its proper divisors (894957176031).

2684871528081 is an equidigital number, since it uses as much as digits as its factorization.

2684871528081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894957176030.

The product of its (nonzero) digits is 13762560, while the sum is 60.

The spelling of 2684871528081 in words is "two trillion, six hundred eighty-four billion, eight hundred seventy-one million, five hundred twenty-eight thousand, eighty-one".