3681220552105 has 4 divisors (see below), whose sum is σ = 4417464662532. Its totient is φ = 2944976441680.

The previous prime is 3681220552057. The next prime is 3681220552189. The reversal of 3681220552105 is 5012550221863.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 744154670736 + 2937065881369 = 862644^2 + 1713787^2 .

It is not a de Polignac number, because 3681220552105 - 2¹⁵ = 3681220519337 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368122055206 + ... + 368122055215.

It is an arithmetic number, because the mean of its divisors is an integer number (1104366165633).

Almost surely, 2^{3681220552105} is an apocalyptic number.

It is an amenable number.

3681220552105 is a deficient number, since it is larger than the sum of its proper divisors (736244110427).

3681220552105 is an equidigital number, since it uses as much as digits as its factorization.

3681220552105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736244110426.

The product of its (nonzero) digits is 144000, while the sum is 40.

Adding to 3681220552105 its reverse (5012550221863), we get a palindrome (8693770773968).

The spelling of 3681220552105 in words is "three trillion, six hundred eighty-one billion, two hundred twenty million, five hundred fifty-two thousand, one hundred five".