56785881556 has 12 divisors (see below), whose sum is σ = 103695957792. Its totient is φ = 27158465048.

The previous prime is 56785881553. The next prime is 56785881583. The reversal of 56785881556 is 65518858765.

It is a super-2 number, since 2×56785881556² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56785881553) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 308618830 + ... + 308619013.

It is an arithmetic number, because the mean of its divisors is an integer number (8641329816).

Almost surely, 2^56785881556 is an apocalyptic number.

It is an amenable number.

56785881556 is a deficient number, since it is larger than the sum of its proper divisors (46910076236).

56785881556 is a wasteful number, since it uses less digits than its factorization.

56785881556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617237870 (or 617237868 counting only the distinct ones).

The product of its digits is 80640000, while the sum is 64.

The spelling of 56785881556 in words is "fifty-six billion, seven hundred eighty-five million, eight hundred eighty-one thousand, five hundred fifty-six".