56783673661 has 12 divisors (see below), whose sum is σ = 67077434880. Its totient is φ = 47650633680.

The previous prime is 56783673659. The next prime is 56783673697. The reversal of 56783673661 is 16637638765.

It is not a de Polignac number, because 56783673661 - 2¹ = 56783673659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56783673596 and 56783673605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56783673631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15270781 + ... + 15274498.

It is an arithmetic number, because the mean of its divisors is an integer number (5589786240).

Almost surely, 2^56783673661 is an apocalyptic number.

It is an amenable number.

56783673661 is a deficient number, since it is larger than the sum of its proper divisors (10293761219).

56783673661 is a wasteful number, since it uses less digits than its factorization.

56783673661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30545316 (or 30545303 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 58.

The spelling of 56783673661 in words is "fifty-six billion, seven hundred eighty-three million, six hundred seventy-three thousand, six hundred sixty-one".