56550780 has 180 divisors, whose sum is σ = 202725432. Its totient is φ = 12654720.

The previous prime is 56550779. The next prime is 56550787. The reversal of 56550780 is 8705565.

It is a tau number, because it is divible by the number of its divisors (180).

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

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56550787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4350054 + ... + 4350066.

Almost surely, 2^56550780 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 56550780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101362716).

56550780 is an abundant number, since it is smaller than the sum of its proper divisors (146174652).

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

56550780 is a wasteful number, since it uses less digits than its factorization.

56550780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 56550780 is about 7520.0252659150. The cubic root of 56550780 is about 383.8364375029.

The spelling of 56550780 in words is "fifty-six million, five hundred fifty thousand, seven hundred eighty".