168556964640 has 192 divisors, whose sum is σ = 571912814592. Its totient is φ = 41607244800.

The previous prime is 168556964623. The next prime is 168556964647. The reversal of 168556964640 is 46469655861.

168556964640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×168556964640² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (168556964647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95985 + ... + 588495.

It is an arithmetic number, because the mean of its divisors is an integer number (2978712576).

Almost surely, 2^168556964640 is an apocalyptic number.

168556964640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168556964640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285956407296).

168556964640 is an abundant number, since it is smaller than the sum of its proper divisors (403355849952).

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

168556964640 is a wasteful number, since it uses less digits than its factorization.

168556964640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492583 (or 492575 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 60.

The spelling of 168556964640 in words is "one hundred sixty-eight billion, five hundred fifty-six million, nine hundred sixty-four thousand, six hundred forty".