56542644 has 24 divisors (see below), whose sum is σ = 146592320. Its totient is φ = 18847512.

The previous prime is 56542643. The next prime is 56542691. The reversal of 56542644 is 44624565.

56542644 is a `hidden beast` number, since 5 + 6 + 5 + 4 + 2 + 644 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 56542599 and 56542608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56542643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261664 + ... + 261879.

Almost surely, 2^56542644 is an apocalyptic number.

56542644 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

56542644 is an abundant number, since it is smaller than the sum of its proper divisors (90049676).

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

56542644 is a wasteful number, since it uses less digits than its factorization.

56542644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523556 (or 523548 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 56542644 is about 7519.4842908274. The cubic root of 56542644 is about 383.8180290151.

The spelling of 56542644 in words is "fifty-six million, five hundred forty-two thousand, six hundred forty-four".