172322665540 has 12 divisors (see below), whose sum is σ = 361877597676. Its totient is φ = 68929066208.

The previous prime is 172322665531. The next prime is 172322665621. The reversal of 172322665540 is 45566223271.

It can be written as a sum of positive squares in 2 ways, for example, as 52202196484 + 120120469056 = 228478^2 + 346584^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4308066619 + ... + 4308066658.

It is an arithmetic number, because the mean of its divisors is an integer number (30156466473).

Almost surely, 2^172322665540 is an apocalyptic number.

172322665540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172322665540 is an abundant number, since it is smaller than the sum of its proper divisors (189554932136).

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

172322665540 is a wasteful number, since it uses less digits than its factorization.

172322665540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8616133286 (or 8616133284 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 172322665540 in words is "one hundred seventy-two billion, three hundred twenty-two million, six hundred sixty-five thousand, five hundred forty".