21641614616123 has 8 divisors (see below), whose sum is σ = 22822755379920. Its totient is φ = 20464684693920.

The previous prime is 21641614616099. The next prime is 21641614616189. The reversal of 21641614616123 is 32161641614612.

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 21641614616123 - 2⁶ = 21641614616059 is a prime.

It is a super-3 number, since 3×21641614616123³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21641614616023) 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, 1052699840 + ... + 1052720397.

It is an arithmetic number, because the mean of its divisors is an integer number (2852844422490).

Almost surely, 2^{21641614616123} is an apocalyptic number.

21641614616123 is a deficient number, since it is larger than the sum of its proper divisors (1181140763797).

21641614616123 is a wasteful number, since it uses less digits than its factorization.

21641614616123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105420797.

The product of its digits is 248832, while the sum is 44.

The spelling of 21641614616123 in words is "twenty-one trillion, six hundred forty-one billion, six hundred fourteen million, six hundred sixteen thousand, one hundred twenty-three".