21616875130085 has 8 divisors (see below), whose sum is σ = 27466147224216. Its totient is φ = 16276235392000.

The previous prime is 21616875130079. The next prime is 21616875130099. The reversal of 21616875130085 is 58003157861612.

It can be written as a sum of positive squares in 4 ways, for example, as 492767496676 + 21124107633409 = 701974^2 + 4596097^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-21616875130085 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127158088916 + ... + 127158089085.

It is an arithmetic number, because the mean of its divisors is an integer number (3433268403027).

Almost surely, 2^{21616875130085} is an apocalyptic number.

It is an amenable number.

21616875130085 is a deficient number, since it is larger than the sum of its proper divisors (5849272094131).

21616875130085 is a wasteful number, since it uses less digits than its factorization.

21616875130085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254316178023.

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 21616875130085 in words is "twenty-one trillion, six hundred sixteen billion, eight hundred seventy-five million, one hundred thirty thousand, eighty-five".