55881756 has 108 divisors (see below), whose sum is σ = 166813920. Its totient is φ = 15724800.

The previous prime is 55881751. The next prime is 55881767. The reversal of 55881756 is 65718855.

55881756 is a `hidden beast` number, since 5 + 588 + 17 + 56 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55881751) 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 35 ways as a sum of consecutive naturals, for example, 139156 + ... + 139556.

Almost surely, 2^55881756 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 55881756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83406960).

55881756 is an abundant number, since it is smaller than the sum of its proper divisors (110932164).

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

55881756 is a wasteful number, since it uses less digits than its factorization.

55881756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 492 counting only the distinct ones).

The product of its digits is 336000, while the sum is 45.

The square root of 55881756 is about 7475.4100890854. The cubic root of 55881756 is about 382.3167698596.

The spelling of 55881756 in words is "fifty-five million, eight hundred eighty-one thousand, seven hundred fifty-six".