1683686668517 has 16 divisors (see below), whose sum is σ = 1969027412352. Its totient is φ = 1409551657920.

The previous prime is 1683686668483. The next prime is 1683686668591. The reversal of 1683686668517 is 7158666863861.

It is not a de Polignac number, because 1683686668517 - 2⁶ = 1683686668453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1683686668817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11443463 + ... + 11589659.

It is an arithmetic number, because the mean of its divisors is an integer number (123064213272).

Almost surely, 2^{1683686668517} is an apocalyptic number.

It is an amenable number.

1683686668517 is a deficient number, since it is larger than the sum of its proper divisors (285340743835).

1683686668517 is a wasteful number, since it uses less digits than its factorization.

1683686668517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184508.

The product of its digits is 418037760, while the sum is 71.

The spelling of 1683686668517 in words is "one trillion, six hundred eighty-three billion, six hundred eighty-six million, six hundred sixty-eight thousand, five hundred seventeen".