21616565268003 has 8 divisors (see below), whose sum is σ = 28822647110400. Its totient is φ = 14410763468808.

The previous prime is 21616565267909. The next prime is 21616565268013. The reversal of 21616565268003 is 30086256561612.

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

It is not a de Polignac number, because 21616565268003 - 2⁸ = 21616565267747 is a prime.

It is a super-2 number, since 2×21616565268003² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21616565268013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69830623 + ... + 70139496.

It is an arithmetic number, because the mean of its divisors is an integer number (3602830888800).

Almost surely, 2^{21616565268003} is an apocalyptic number.

21616565268003 is a deficient number, since it is larger than the sum of its proper divisors (7206081842397).

21616565268003 is a wasteful number, since it uses less digits than its factorization.

21616565268003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140021601.

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 21616565268003 in words is "twenty-one trillion, six hundred sixteen billion, five hundred sixty-five million, two hundred sixty-eight thousand, three".