117170729820 has 180 divisors, whose sum is σ = 372086253000. Its totient is φ = 30866135616.

The previous prime is 117170729693. The next prime is 117170729831. The reversal of 117170729820 is 28927071711.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 11154931 + ... + 11165429.

It is an arithmetic number, because the mean of its divisors is an integer number (2067145850).

Almost surely, 2^117170729820 is an apocalyptic number.

117170729820 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 117170729820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186043126500).

117170729820 is an abundant number, since it is smaller than the sum of its proper divisors (254915523180).

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

117170729820 is a wasteful number, since it uses less digits than its factorization.

117170729820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10686 (or 10592 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 45.

The spelling of 117170729820 in words is "one hundred seventeen billion, one hundred seventy million, seven hundred twenty-nine thousand, eight hundred twenty".