56783785671 has 40 divisors (see below), whose sum is σ = 85178548224. Its totient is φ = 37698495120.

The previous prime is 56783785661. The next prime is 56783785697. The reversal of 56783785671 is 17658738765.

56783785671 is a `hidden beast` number, since 5 + 67 + 8 + 3 + 7 + 8 + 567 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-56783785671 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56783785599 and 56783785608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56783785631) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30742870 + ... + 30744716.

Almost surely, 2^56783785671 is an apocalyptic number.

56783785671 is a deficient number, since it is larger than the sum of its proper divisors (28394762553).

56783785671 is a wasteful number, since it uses less digits than its factorization.

56783785671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233 (or 3224 counting only the distinct ones).

The product of its digits is 59270400, while the sum is 63.

The spelling of 56783785671 in words is "fifty-six billion, seven hundred eighty-three million, seven hundred eighty-five thousand, six hundred seventy-one".