168945786469 has 8 divisors (see below), whose sum is σ = 173552962968. Its totient is φ = 164340771840.

The previous prime is 168945786437. The next prime is 168945786479. The reversal of 168945786469 is 964687549861.

It can be written as a sum of positive squares in 4 ways, for example, as 51149250244 + 117796536225 = 226162^2 + 343215^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 168945786469 - 2⁵ = 168945786437 is a prime.

It is a super-2 number, since 2×168945786469² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168945786419) 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, 381412 + ... + 695245.

It is an arithmetic number, because the mean of its divisors is an integer number (21694120371).

Almost surely, 2^168945786469 is an apocalyptic number.

It is an amenable number.

168945786469 is a deficient number, since it is larger than the sum of its proper divisors (4607176499).

168945786469 is a wasteful number, since it uses less digits than its factorization.

168945786469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080935.

The product of its digits is 627056640, while the sum is 73.

The spelling of 168945786469 in words is "one hundred sixty-eight billion, nine hundred forty-five million, seven hundred eighty-six thousand, four hundred sixty-nine".