168746561556 has 24 divisors (see below), whose sum is σ = 393756449184. Its totient is φ = 56246786400.

The previous prime is 168746561537. The next prime is 168746561573. The reversal of 168746561556 is 655165647861.

It is a super-2 number, since 2×168746561556² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 168746561556.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101731 + ... + 589781.

It is an arithmetic number, because the mean of its divisors is an integer number (16406518716).

Almost surely, 2^168746561556 is an apocalyptic number.

It is an amenable number.

168746561556 is an abundant number, since it is smaller than the sum of its proper divisors (225009887628).

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

168746561556 is a wasteful number, since it uses less digits than its factorization.

168746561556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516871 (or 516869 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 60.

The spelling of 168746561556 in words is "one hundred sixty-eight billion, seven hundred forty-six million, five hundred sixty-one thousand, five hundred fifty-six".