21616540104613 has 8 divisors (see below), whose sum is σ = 22216691981088. Its totient is φ = 21020817393744.

The previous prime is 21616540104559. The next prime is 21616540104629. The reversal of 21616540104613 is 31640104561612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21616540104613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21616540104413) 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, 1107281506 + ... + 1107301027.

It is an arithmetic number, because the mean of its divisors is an integer number (2777086497636).

Almost surely, 2^{21616540104613} is an apocalyptic number.

It is an amenable number.

21616540104613 is a deficient number, since it is larger than the sum of its proper divisors (600151876475).

21616540104613 is a wasteful number, since it uses less digits than its factorization.

21616540104613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214582803.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 21616540104613 in words is "twenty-one trillion, six hundred sixteen billion, five hundred forty million, one hundred four thousand, six hundred thirteen".