21061616616062 has 32 divisors (see below), whose sum is σ = 35065681795584. Its totient is φ = 9406781647200.

The previous prime is 21061616616037. The next prime is 21061616616071. The reversal of 21061616616062 is 26061661616012.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6817178 + ... + 9412605.

It is an arithmetic number, because the mean of its divisors is an integer number (1095802556112).

Almost surely, 2^{21061616616062} is an apocalyptic number.

21061616616062 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21061616616062 is a deficient number, since it is larger than the sum of its proper divisors (14004065179522).

21061616616062 is a wasteful number, since it uses less digits than its factorization.

21061616616062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16230824.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 21061616616062 in words is "twenty-one trillion, sixty-one billion, six hundred sixteen million, six hundred sixteen thousand, sixty-two".