1686871683555 has 8 divisors (see below), whose sum is σ = 2698994693712. Its totient is φ = 899664897888.

The previous prime is 1686871683551. The next prime is 1686871683643. The reversal of 1686871683555 is 5553861786861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1686871683555 - 2² = 1686871683551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1686871683555.

It is not an unprimeable number, because it can be changed into a prime (1686871683551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56229056104 + ... + 56229056133.

It is an arithmetic number, because the mean of its divisors is an integer number (337374336714).

Almost surely, 2^{1686871683555} is an apocalyptic number.

1686871683555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1686871683555 is a deficient number, since it is larger than the sum of its proper divisors (1012123010157).

1686871683555 is a wasteful number, since it uses less digits than its factorization.

1686871683555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112458112245.

The product of its digits is 290304000, while the sum is 69.

The spelling of 1686871683555 in words is "one trillion, six hundred eighty-six billion, eight hundred seventy-one million, six hundred eighty-three thousand, five hundred fifty-five".