168590443969 has 8 divisors (see below), whose sum is σ = 179239718592. Its totient is φ = 158217774000.

The previous prime is 168590443951. The next prime is 168590443979. The reversal of 168590443969 is 969344095861.

It is a happy number.

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 168590443969 - 2³⁷ = 31151490497 is a prime.

It is a super-2 number, since 2×168590443969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168590443969.

It is not an unprimeable number, because it can be changed into a prime (168590443949) 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, 69149907 + ... + 69152344.

It is an arithmetic number, because the mean of its divisors is an integer number (22404964824).

Almost surely, 2^168590443969 is an apocalyptic number.

It is an amenable number.

168590443969 is a deficient number, since it is larger than the sum of its proper divisors (10649274623).

168590443969 is a wasteful number, since it uses less digits than its factorization.

168590443969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138302327.

The product of its (nonzero) digits is 50388480, while the sum is 64.

The spelling of 168590443969 in words is "one hundred sixty-eight billion, five hundred ninety million, four hundred forty-three thousand, nine hundred sixty-nine".