21615544116614 has 16 divisors (see below), whose sum is σ = 37608281449728. Its totient is φ = 9125538880392.

The previous prime is 21615544116611. The next prime is 21615544116623. The reversal of 21615544116614 is 41661144551612.

It is a super-2 number, since 2×21615544116614² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21615544116611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11522144114 + ... + 11522145989.

It is an arithmetic number, because the mean of its divisors is an integer number (2350517590608).

Almost surely, 2^{21615544116614} is an apocalyptic number.

21615544116614 is a deficient number, since it is larger than the sum of its proper divisors (15992737333114).

21615544116614 is a wasteful number, since it uses less digits than its factorization.

21615544116614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23044290179.

The product of its digits is 691200, while the sum is 47.

The spelling of 21615544116614 in words is "twenty-one trillion, six hundred fifteen billion, five hundred forty-four million, one hundred sixteen thousand, six hundred fourteen".