21616543353514 has 8 divisors (see below), whose sum is σ = 32424898729860. Its totient is φ = 10808243776896.

The previous prime is 21616543353497. The next prime is 21616543353571. The reversal of 21616543353514 is 41535334561612.

It can be written as a sum of positive squares in 2 ways, for example, as 18286527875625 + 3330015477889 = 4276275^2 + 1824833^2 .

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

It is a super-2 number, since 2×21616543353514² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12967609 + ... + 14539324.

Almost surely, 2^{21616543353514} is an apocalyptic number.

21616543353514 is a deficient number, since it is larger than the sum of its proper divisors (10808355376346).

21616543353514 is a wasteful number, since it uses less digits than its factorization.

21616543353514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27899864.

The product of its digits is 3888000, while the sum is 49.

The spelling of 21616543353514 in words is "twenty-one trillion, six hundred sixteen billion, five hundred forty-three million, three hundred fifty-three thousand, five hundred fourteen".