56643544828 has 48 divisors (see below), whose sum is σ = 107889639424. Its totient is φ = 25865542080.

The previous prime is 56643544823. The next prime is 56643544847. The reversal of 56643544828 is 82844534665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56643544823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2411983 + ... + 2435353.

Almost surely, 2^56643544828 is an apocalyptic number.

It is an amenable number.

56643544828 is a deficient number, since it is larger than the sum of its proper divisors (51246094596).

56643544828 is a wasteful number, since it uses less digits than its factorization.

56643544828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23882 (or 23880 counting only the distinct ones).

The product of its digits is 22118400, while the sum is 55.

The spelling of 56643544828 in words is "fifty-six billion, six hundred forty-three million, five hundred forty-four thousand, eight hundred twenty-eight".