168977621904 has 320 divisors, whose sum is σ = 580487846400. Its totient is φ = 41943121920.

The previous prime is 168977621903. The next prime is 168977621909. The reversal of 168977621904 is 409126779861.

It is not an unprimeable number, because it can be changed into a prime (168977621903) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3615324 + ... + 3661764.

It is an arithmetic number, because the mean of its divisors is an integer number (1814024520).

Almost surely, 2^168977621904 is an apocalyptic number.

168977621904 is a gapful number since it is divisible by the number (14) 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 168977621904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290243923200).

168977621904 is an abundant number, since it is smaller than the sum of its proper divisors (411510224496).

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

168977621904 is a wasteful number, since it uses less digits than its factorization.

168977621904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46503 (or 46483 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 168977621904 in words is "one hundred sixty-eight billion, nine hundred seventy-seven million, six hundred twenty-one thousand, nine hundred four".