16615357413681 has 32 divisors (see below), whose sum is σ = 24250667496832. Its totient is φ = 10056549634560.

The previous prime is 16615357413667. The next prime is 16615357413703. The reversal of 16615357413681 is 18631475351661.

It is not a de Polignac number, because 16615357413681 - 2⁵ = 16615357413649 is a prime.

It is a super-2 number, since 2×16615357413681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16615357493681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36991461 + ... + 37437933.

It is an arithmetic number, because the mean of its divisors is an integer number (757833359276).

Almost surely, 2^{16615357413681} is an apocalyptic number.

It is an amenable number.

16615357413681 is a deficient number, since it is larger than the sum of its proper divisors (7635310083151).

16615357413681 is a wasteful number, since it uses less digits than its factorization.

16615357413681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462193.

The product of its digits is 10886400, while the sum is 57.

The spelling of 16615357413681 in words is "sixteen trillion, six hundred fifteen billion, three hundred fifty-seven million, four hundred thirteen thousand, six hundred eighty-one".