55571760 has 120 divisors (see below), whose sum is σ = 189184320. Its totient is φ = 14616576.

The previous prime is 55571741. The next prime is 55571773. The reversal of 55571760 is 6717555.

It is a tau number, because it is divible by the number of its divisors (120).

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, 56392 + ... + 57368.

It is an arithmetic number, because the mean of its divisors is an integer number (1576536).

Almost surely, 2^55571760 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 55571760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94592160).

55571760 is an abundant number, since it is smaller than the sum of its proper divisors (133612560).

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

55571760 is a wasteful number, since it uses less digits than its factorization.

55571760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The square root of 55571760 is about 7454.6468729243. The cubic root of 55571760 is about 381.6085094947.

The spelling of 55571760 in words is "fifty-five million, five hundred seventy-one thousand, seven hundred sixty".