168558971672 has 128 divisors (see below), whose sum is σ = 395435174400. Its totient is φ = 65583710208.

The previous prime is 168558971663. The next prime is 168558971681. The reversal of 168558971672 is 276179855861.

It is an interprime number because it is at equal distance from previous prime (168558971663) and next prime (168558971681).

It is a super-2 number, since 2×168558971672² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 168558971599 and 168558971608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13710104 + ... + 13722392.

It is an arithmetic number, because the mean of its divisors is an integer number (3089337300).

Almost surely, 2^168558971672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168558971672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197717587200).

168558971672 is an abundant number, since it is smaller than the sum of its proper divisors (226876202728).

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

168558971672 is a wasteful number, since it uses less digits than its factorization.

168558971672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12625 (or 12621 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 65.

The spelling of 168558971672 in words is "one hundred sixty-eight billion, five hundred fifty-eight million, nine hundred seventy-one thousand, six hundred seventy-two".