56571648 has 144 divisors (see below), whose sum is σ = 182488320. Its totient is φ = 15187968.

The previous prime is 56571601. The next prime is 56571659. The reversal of 56571648 is 84617565.

56571648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91083 + ... + 91701.

It is an arithmetic number, because the mean of its divisors is an integer number (1267280).

Almost surely, 2^56571648 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 56571648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91244160).

56571648 is an abundant number, since it is smaller than the sum of its proper divisors (125916672).

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

56571648 is a wasteful number, since it uses less digits than its factorization.

56571648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 648 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 56571648 is about 7521.4126332757. The cubic root of 56571648 is about 383.8836453028.

The spelling of 56571648 in words is "fifty-six million, five hundred seventy-one thousand, six hundred forty-eight".