1688672172052 has 12 divisors (see below), whose sum is σ = 2978445406720. Its totient is φ = 837687770136.

The previous prime is 1688672172049. The next prime is 1688672172053. The reversal of 1688672172052 is 2502712768861.

It is a super-2 number, since 2×1688672172052² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1688672171984 and 1688672172002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688672172053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662078402 + ... + 1662079417.

Almost surely, 2^{1688672172052} is an apocalyptic number.

It is an amenable number.

1688672172052 is a deficient number, since it is larger than the sum of its proper divisors (1289773234668).

1688672172052 is a wasteful number, since it uses less digits than its factorization.

1688672172052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324157950 (or 3324157948 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 1688672172052 in words is "one trillion, six hundred eighty-eight billion, six hundred seventy-two million, one hundred seventy-two thousand, fifty-two".