172808440500 has 96 divisors (see below), whose sum is σ = 504228816000. Its totient is φ = 45989702400.

The previous prime is 172808440471. The next prime is 172808440507. The reversal of 172808440500 is 5044808271.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172808440507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 633064 + ... + 863936.

It is an arithmetic number, because the mean of its divisors is an integer number (5252383500).

Almost surely, 2^172808440500 is an apocalyptic number.

172808440500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172808440500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252114408000).

172808440500 is an abundant number, since it is smaller than the sum of its proper divisors (331420375500).

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

172808440500 is a wasteful number, since it uses less digits than its factorization.

172808440500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231394 (or 231382 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The spelling of 172808440500 in words is "one hundred seventy-two billion, eight hundred eight million, four hundred forty thousand, five hundred".