172945117389 has 16 divisors (see below), whose sum is σ = 252684601344. Its totient is φ = 104345194800.

The previous prime is 172945117351. The next prime is 172945117391. The reversal of 172945117389 is 983711549271.

It is not a de Polignac number, because 172945117389 - 2¹¹ = 172945115341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172945117589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11743227 + ... + 11757944.

It is an arithmetic number, because the mean of its divisors is an integer number (15792787584).

Almost surely, 2^172945117389 is an apocalyptic number.

It is an amenable number.

172945117389 is a deficient number, since it is larger than the sum of its proper divisors (79739483955).

172945117389 is a wasteful number, since it uses less digits than its factorization.

172945117389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23501408.

The product of its digits is 3810240, while the sum is 57.

The spelling of 172945117389 in words is "one hundred seventy-two billion, nine hundred forty-five million, one hundred seventeen thousand, three hundred eighty-nine".