168909689220 has 48 divisors (see below), whose sum is σ = 473480477568. Its totient is φ = 44991788800.

The previous prime is 168909689209. The next prime is 168909689237. The reversal of 168909689220 is 22986909861.

It is a super-2 number, since 2×168909689220² (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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1533681 + ... + 1640120.

It is an arithmetic number, because the mean of its divisors is an integer number (9864176616).

Almost surely, 2^168909689220 is an apocalyptic number.

168909689220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168909689220 is an abundant number, since it is smaller than the sum of its proper divisors (304570788348).

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

168909689220 is a wasteful number, since it uses less digits than its factorization.

168909689220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3174700 (or 3174698 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 60.

The spelling of 168909689220 in words is "one hundred sixty-eight billion, nine hundred nine million, six hundred eighty-nine thousand, two hundred twenty".