1684587066172 has 6 divisors (see below), whose sum is σ = 2948027365808. Its totient is φ = 842293533084.

The previous prime is 1684587066167. The next prime is 1684587066271. The reversal of 1684587066172 is 2716607854861.

It is a self number, because there is not a number n which added to its sum of digits gives 1684587066172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210573383268 + ... + 210573383275.

Almost surely, 2^{1684587066172} is an apocalyptic number.

It is an amenable number.

1684587066172 is a deficient number, since it is larger than the sum of its proper divisors (1263440299636).

1684587066172 is a wasteful number, since it uses less digits than its factorization.

1684587066172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421146766547 (or 421146766545 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 1684587066172 in words is "one trillion, six hundred eighty-four billion, five hundred eighty-seven million, sixty-six thousand, one hundred seventy-two".