171999941502768 has 20 divisors (see below), whose sum is σ = 444333182215608. Its totient is φ = 57333313834240.

The previous prime is 171999941502743. The next prime is 171999941502833. The reversal of 171999941502768 is 867205149999171.

It is a super-2 number, since 2×171999941502768² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 171999941502693 and 171999941502702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1791666057273 + ... + 1791666057368.

Almost surely, 2^{171999941502768} is an apocalyptic number.

It is an amenable number.

171999941502768 is an abundant number, since it is smaller than the sum of its proper divisors (272333240712840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171999941502768 is a wasteful number, since it uses less digits than its factorization.

171999941502768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583332114652 (or 3583332114646 counting only the distinct ones).

The product of its (nonzero) digits is 617258880, while the sum is 78.

The spelling of 171999941502768 in words is "one hundred seventy-one trillion, nine hundred ninety-nine billion, nine hundred forty-one million, five hundred two thousand, seven hundred sixty-eight".