51616616 has 16 divisors (see below), whose sum is σ = 101875200. Its totient is φ = 24449904.

The previous prime is 51616583. The next prime is 51616667. The reversal of 51616616 is 61661615.

51616616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169640 + ... + 169943.

It is an arithmetic number, because the mean of its divisors is an integer number (6367200).

Almost surely, 2^51616616 is an apocalyptic number.

It is an amenable number.

51616616 is a deficient number, since it is larger than the sum of its proper divisors (50258584).

51616616 is a wasteful number, since it uses less digits than its factorization.

51616616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339608 (or 339604 counting only the distinct ones).

The product of its digits is 6480, while the sum is 32.

The square root of 51616616 is about 7184.4704745722. The cubic root of 51616616 is about 372.3315539462.

The spelling of 51616616 in words is "fifty-one million, six hundred sixteen thousand, six hundred sixteen".