1691986616675 has 24 divisors (see below), whose sum is σ = 2114220968400. Its totient is φ = 1343172948480.

The previous prime is 1691986616633. The next prime is 1691986616689. The reversal of 1691986616675 is 5766166891961.

It is a de Polignac number, because none of the positive numbers 2^k-1691986616675 is a prime.

It is a super-2 number, since 2×1691986616675² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1691986616599 and 1691986616608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8598791 + ... + 8793359.

It is an arithmetic number, because the mean of its divisors is an integer number (88092540350).

Almost surely, 2^{1691986616675} is an apocalyptic number.

1691986616675 is a deficient number, since it is larger than the sum of its proper divisors (422234351725).

1691986616675 is a wasteful number, since it uses less digits than its factorization.

1691986616675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197255 (or 197250 counting only the distinct ones).

The product of its digits is 176359680, while the sum is 71.

The spelling of 1691986616675 in words is "one trillion, six hundred ninety-one billion, nine hundred eighty-six million, six hundred sixteen thousand, six hundred seventy-five".