168397545919 has 4 divisors (see below), whose sum is σ = 168398875800. Its totient is φ = 168396216040.

The previous prime is 168397545893. The next prime is 168397545929. The reversal of 168397545919 is 919545793861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 168397545919 - 2¹¹ = 168397543871 is a prime.

It is a super-2 number, since 2×168397545919² (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 (168397545929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452344 + ... + 735805.

It is an arithmetic number, because the mean of its divisors is an integer number (42099718950).

Almost surely, 2^168397545919 is an apocalyptic number.

168397545919 is a deficient number, since it is larger than the sum of its proper divisors (1329881).

168397545919 is a wasteful number, since it uses less digits than its factorization.

168397545919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329880.

The product of its digits is 73483200, while the sum is 67.

The spelling of 168397545919 in words is "one hundred sixty-eight billion, three hundred ninety-seven million, five hundred forty-five thousand, nine hundred nineteen".