55616000 has 160 divisors (see below), whose sum is σ = 153204480. Its totient is φ = 19968000.

The previous prime is 55615991. The next prime is 55616003. The reversal of 55616000 is 61655.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55616003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 703961 + ... + 704039.

It is an arithmetic number, because the mean of its divisors is an integer number (957528).

Almost surely, 2^55616000 is an apocalyptic number.

55616000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55616000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76602240).

55616000 is an abundant number, since it is smaller than the sum of its proper divisors (97588480).

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

55616000 is an equidigital number, since it uses as much as digits as its factorization.

55616000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 55616000 is about 7457.6135593097. The cubic root of 55616000 is about 381.7097472606.

Adding to 55616000 its reverse (61655), we get a palindrome (55677655).

The spelling of 55616000 in words is "fifty-five million, six hundred sixteen thousand".