21632161523061 has 8 divisors (see below), whose sum is σ = 28989292600224. Its totient is φ = 14348235730640.

The previous prime is 21632161523041. The next prime is 21632161523129. The reversal of 21632161523061 is 16032516123612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21632161523061 - 2⁵ = 21632161523029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632161523041) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18301320495 + ... + 18301321676.

It is an arithmetic number, because the mean of its divisors is an integer number (3623661575028).

Almost surely, 2^{21632161523061} is an apocalyptic number.

It is an amenable number.

21632161523061 is a deficient number, since it is larger than the sum of its proper divisors (7357131077163).

21632161523061 is a wasteful number, since it uses less digits than its factorization.

21632161523061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36602642371.

The product of its (nonzero) digits is 77760, while the sum is 39.

Adding to 21632161523061 its reverse (16032516123612), we get a palindrome (37664677646673).

The spelling of 21632161523061 in words is "twenty-one trillion, six hundred thirty-two billion, one hundred sixty-one million, five hundred twenty-three thousand, sixty-one".