55165616 has 40 divisors (see below), whose sum is σ = 120373248. Its totient is φ = 24264000.

The previous prime is 55165613. The next prime is 55165619. The reversal of 55165616 is 61656155.

It is an interprime number because it is at equal distance from previous prime (55165613) and next prime (55165619).

It is not an unprimeable number, because it can be changed into a prime (55165613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401 + ... + 10511.

Almost surely, 2^55165616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55165616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60186624).

55165616 is an abundant number, since it is smaller than the sum of its proper divisors (65207632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55165616 is a wasteful number, since it uses less digits than its factorization.

55165616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10161 (or 10155 counting only the distinct ones).

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

The square root of 55165616 is about 7427.3559225339. The cubic root of 55165616 is about 380.6765785907.

The spelling of 55165616 in words is "fifty-five million, one hundred sixty-five thousand, six hundred sixteen".