173729899980 has 432 divisors, whose sum is σ = 673549531200. Its totient is φ = 36652580352.

The previous prime is 173729899921. The next prime is 173729899991. The reversal of 173729899980 is 89998927371.

173729899980 is a `hidden beast` number, since 1 + 7 + 372 + 98 + 9 + 99 + 80 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 173729899899 and 173729899908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11933746 + ... + 11948294.

Almost surely, 2^173729899980 is an apocalyptic number.

173729899980 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 173729899980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336774765600).

173729899980 is an abundant number, since it is smaller than the sum of its proper divisors (499819631220).

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

173729899980 is a wasteful number, since it uses less digits than its factorization.

173729899980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14602 (or 14579 counting only the distinct ones).

The product of its (nonzero) digits is 123451776, while the sum is 72.

The spelling of 173729899980 in words is "one hundred seventy-three billion, seven hundred twenty-nine million, eight hundred ninety-nine thousand, nine hundred eighty".