1683640056 has 64 divisors (see below), whose sum is σ = 4864492800. Its totient is φ = 475630848.

The previous prime is 1683640009. The next prime is 1683640061. The reversal of 1683640056 is 6500463861.

It is a junction number, because it is equal to n+sod(n) for n = 1683639996 and 1683640023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41350 + ... + 71253.

It is an arithmetic number, because the mean of its divisors is an integer number (76007700).

Almost surely, 2^1683640056 is an apocalyptic number.

It is an amenable number.

1683640056 is an abundant number, since it is smaller than the sum of its proper divisors (3180852744).

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

1683640056 is a wasteful number, since it uses less digits than its factorization.

1683640056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112708 (or 112704 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 1683640056 is about 41032.1831736992. The cubic root of 1683640056 is about 1189.6423509161.

The spelling of 1683640056 in words is "one billion, six hundred eighty-three million, six hundred forty thousand, fifty-six".