2181536351812 has 12 divisors (see below), whose sum is σ = 3819103117200. Its totient is φ = 1090364032616.

The previous prime is 2181536351807. The next prime is 2181536351821.

2181536351812 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101023678 + ... + 101045269.

It is an arithmetic number, because the mean of its divisors is an integer number (318258593100).

Almost surely, 2^{2181536351812} is an apocalyptic number.

It is an amenable number.

2181536351812 is a deficient number, since it is larger than the sum of its proper divisors (1637566765388).

2181536351812 is a wasteful number, since it uses less digits than its factorization.

2181536351812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202071650 (or 202071648 counting only the distinct ones).

The product of its digits is 345600, while the sum is 46.

The spelling of 2181536351812 in words is "two trillion, one hundred eighty-one billion, five hundred thirty-six million, three hundred fifty-one thousand, eight hundred twelve".