2104728572161 has 4 divisors (see below), whose sum is σ = 2107112184112. Its totient is φ = 2102344960212.

The previous prime is 2104728572159. The next prime is 2104728572179. The reversal of 2104728572161 is 1612758274012.

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 2104728572161 - 2¹ = 2104728572159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2104728572101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1191804651 + ... + 1191806416.

It is an arithmetic number, because the mean of its divisors is an integer number (526778046028).

Almost surely, 2^{2104728572161} is an apocalyptic number.

It is an amenable number.

2104728572161 is a deficient number, since it is larger than the sum of its proper divisors (2383611951).

2104728572161 is an equidigital number, since it uses as much as digits as its factorization.

2104728572161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383611950.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 2104728572161 in words is "two trillion, one hundred four billion, seven hundred twenty-eight million, five hundred seventy-two thousand, one hundred sixty-one".