168497578320 has 40 divisors (see below), whose sum is σ = 522342493536. Its totient is φ = 44932687488.

The previous prime is 168497578289. The next prime is 168497578321. The reversal of 168497578320 is 23875794861.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168497578321) 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 7 ways as a sum of consecutive naturals, for example, 351036382 + ... + 351036861.

It is a 1-persistent number, because it is pandigital, but 2⋅168497578320 = 336995156640 is not.

Almost surely, 2^168497578320 is an apocalyptic number.

168497578320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168497578320 is an abundant number, since it is smaller than the sum of its proper divisors (353844915216).

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

168497578320 is a wasteful number, since it uses less digits than its factorization.

168497578320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702073259 (or 702073253 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 168497578320 in words is "one hundred sixty-eight billion, four hundred ninety-seven million, five hundred seventy-eight thousand, three hundred twenty".