172800000018 has 12 divisors (see below), whose sum is σ = 374400000078. Its totient is φ = 57600000000.

The previous prime is 172799999963. The next prime is 172800000031. The reversal of 172800000018 is 810000008271.

It can be written as a sum of positive squares in only one way, i.e., 167025063969 + 5774936049 = 408687^2 + 75993^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172799999937 and 172800000000.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4799999983 + ... + 4800000018.

Almost surely, 2^172800000018 is an apocalyptic number.

172800000018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

172800000018 is an abundant number, since it is smaller than the sum of its proper divisors (201600000060).

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

172800000018 is a wasteful number, since it uses less digits than its factorization.

172800000018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9600000009 (or 9600000006 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

Adding to 172800000018 its reverse (810000008271), we get a palindrome (982800008289).

The spelling of 172800000018 in words is "one hundred seventy-two billion, eight hundred million, eighteen", and thus it is an aban number.