172128509496 has 24 divisors (see below), whose sum is σ = 466181380080. Its totient is φ = 57376169808.

The previous prime is 172128509491. The next prime is 172128509519. The reversal of 172128509496 is 694905821271.

It is a happy number.

172128509496 is a `hidden beast` number, since 1 + 7 + 2 + 128 + 509 + 4 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172128509491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1195336800 + ... + 1195336943.

It is an arithmetic number, because the mean of its divisors is an integer number (19424224170).

Almost surely, 2^172128509496 is an apocalyptic number.

It is an amenable number.

172128509496 is an abundant number, since it is smaller than the sum of its proper divisors (294052870584).

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

172128509496 is a wasteful number, since it uses less digits than its factorization.

172128509496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390673755 (or 2390673748 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 172128509496 in words is "one hundred seventy-two billion, one hundred twenty-eight million, five hundred nine thousand, four hundred ninety-six".