172172061280 has 48 divisors (see below), whose sum is σ = 410356152864. Its totient is φ = 68259358720.

The previous prime is 172172061209. The next prime is 172172061283. The reversal of 172172061280 is 82160271271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172172061283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4743316 + ... + 4779475.

It is an arithmetic number, because the mean of its divisors is an integer number (8549086518).

Almost surely, 2^172172061280 is an apocalyptic number.

172172061280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172172061280 is an abundant number, since it is smaller than the sum of its proper divisors (238184091584).

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

172172061280 is a wasteful number, since it uses less digits than its factorization.

172172061280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9522919 (or 9522911 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 37.

The spelling of 172172061280 in words is "one hundred seventy-two billion, one hundred seventy-two million, sixty-one thousand, two hundred eighty".