172730656280 has 256 divisors, whose sum is σ = 511134624000. Its totient is φ = 50976718848.

The previous prime is 172730656253. The next prime is 172730656321. The reversal of 172730656280 is 82656037271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6732116 + ... + 6757724.

It is an arithmetic number, because the mean of its divisors is an integer number (1996619625).

Almost surely, 2^172730656280 is an apocalyptic number.

172730656280 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 172730656280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255567312000).

172730656280 is an abundant number, since it is smaller than the sum of its proper divisors (338403967720).

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

172730656280 is a wasteful number, since it uses less digits than its factorization.

172730656280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25766 (or 25762 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 172730656280 in words is "one hundred seventy-two billion, seven hundred thirty million, six hundred fifty-six thousand, two hundred eighty".