172105576530 has 128 divisors (see below), whose sum is σ = 423942543360. Its totient is φ = 44701017600.

The previous prime is 172105576483. The next prime is 172105576571. The reversal of 172105576530 is 35675501271.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 156886942 + ... + 156888038.

It is an arithmetic number, because the mean of its divisors is an integer number (3312051120).

Almost surely, 2^172105576530 is an apocalyptic number.

172105576530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172105576530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211971271680).

172105576530 is an abundant number, since it is smaller than the sum of its proper divisors (251836966830).

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

172105576530 is a wasteful number, since it uses less digits than its factorization.

172105576530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904.

The product of its (nonzero) digits is 220500, while the sum is 42.

The spelling of 172105576530 in words is "one hundred seventy-two billion, one hundred five million, five hundred seventy-six thousand, five hundred thirty".