55481760 has 144 divisors (see below), whose sum is σ = 196481376. Its totient is φ = 14784768.

The previous prime is 55481737. The next prime is 55481791. The reversal of 55481760 is 6718455.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38167 + ... + 39593.

It is an arithmetic number, because the mean of its divisors is an integer number (1364454).

Almost surely, 2^55481760 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 55481760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98240688).

55481760 is an abundant number, since it is smaller than the sum of its proper divisors (140999616).

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

55481760 is a wasteful number, since it uses less digits than its factorization.

55481760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 55481760 is about 7448.6079236324. The cubic root of 55481760 is about 381.4023896758.

The spelling of 55481760 in words is "fifty-five million, four hundred eighty-one thousand, seven hundred sixty".