21652406606161 has 8 divisors (see below), whose sum is σ = 23665628473344. Its totient is φ = 19721357060160.

The previous prime is 21652406606137. The next prime is 21652406606177. The reversal of 21652406606161 is 16160660425612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21652406606161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21652406646161) 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 7 ways as a sum of consecutive naturals, for example, 20543079745 + ... + 20543080798.

It is an arithmetic number, because the mean of its divisors is an integer number (2958203559168).

Almost surely, 2^{21652406606161} is an apocalyptic number.

It is an amenable number.

21652406606161 is a deficient number, since it is larger than the sum of its proper divisors (2013221867183).

21652406606161 is a wasteful number, since it uses less digits than its factorization.

21652406606161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41086160591.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 21652406606161 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred six million, six hundred six thousand, one hundred sixty-one".