55661516 has 12 divisors (see below), whose sum is σ = 97472088. Its totient is φ = 27812352.

The previous prime is 55661471. The next prime is 55661531. The reversal of 55661516 is 61516655.

55661516 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, 3980 + ... + 11276.

It is an arithmetic number, because the mean of its divisors is an integer number (8122674).

Almost surely, 2^55661516 is an apocalyptic number.

It is an amenable number.

55661516 is a deficient number, since it is larger than the sum of its proper divisors (41810572).

55661516 is a wasteful number, since it uses less digits than its factorization.

55661516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9208 (or 9206 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

The square root of 55661516 is about 7460.6645816576. The cubic root of 55661516 is about 381.8138489785.

The spelling of 55661516 in words is "fifty-five million, six hundred sixty-one thousand, five hundred sixteen".