56861442428 has 24 divisors (see below), whose sum is σ = 116142523392. Its totient is φ = 23850695664.

The previous prime is 56861442419. The next prime is 56861442433. The reversal of 56861442428 is 82424416865.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21602576 + ... + 21605207.

It is an arithmetic number, because the mean of its divisors is an integer number (4839271808).

Almost surely, 2^56861442428 is an apocalyptic number.

It is an amenable number.

56861442428 is an abundant number, since it is smaller than the sum of its proper divisors (59281080964).

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

56861442428 is a wasteful number, since it uses less digits than its factorization.

56861442428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43207841 (or 43207839 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 50.

The spelling of 56861442428 in words is "fifty-six billion, eight hundred sixty-one million, four hundred forty-two thousand, four hundred twenty-eight".