55493760 has 128 divisors (see below), whose sum is σ = 202204800. Its totient is φ = 12681216.

The previous prime is 55493749. The next prime is 55493771. The reversal of 55493760 is 6739455.

It is an interprime number because it is at equal distance from previous prime (55493749) and next prime (55493771).

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11376 + ... + 15504.

It is an arithmetic number, because the mean of its divisors is an integer number (1579725).

Almost surely, 2^55493760 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 55493760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101102400).

55493760 is an abundant number, since it is smaller than the sum of its proper divisors (146711040).

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

55493760 is a wasteful number, since it uses less digits than its factorization.

55493760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158 (or 4146 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 55493760 is about 7449.4133997248. The cubic root of 55493760 is about 381.4298851911.

The spelling of 55493760 in words is "fifty-five million, four hundred ninety-three thousand, seven hundred sixty".