21266675627616 has 72 divisors (see below), whose sum is σ = 60569723607120. Its totient is φ = 7078035929856.

The previous prime is 21266675627521. The next prime is 21266675627621. The reversal of 21266675627616 is 61672657666212.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-3 number, since 3×21266675627616³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56352996 + ... + 56729123.

It is an arithmetic number, because the mean of its divisors is an integer number (841246161210).

Almost surely, 2^{21266675627616} is an apocalyptic number.

It is an amenable number.

21266675627616 is an abundant number, since it is smaller than the sum of its proper divisors (39303047979504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21266675627616 is a wasteful number, since it uses less digits than its factorization.

21266675627616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113082788 (or 113082777 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 63.

The spelling of 21266675627616 in words is "twenty-one trillion, two hundred sixty-six billion, six hundred seventy-five million, six hundred twenty-seven thousand, six hundred sixteen".