172454189018 has 16 divisors (see below), whose sum is σ = 261261213696. Its totient is φ = 85367240400.

The previous prime is 172454189009. The next prime is 172454189027. The reversal of 172454189018 is 810981454271.

It is an interprime number because it is at equal distance from previous prime (172454189009) and next prime (172454189027).

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 7 ways as a sum of consecutive naturals, for example, 4323755 + ... + 4363457.

It is an arithmetic number, because the mean of its divisors is an integer number (16328825856).

Almost surely, 2^172454189018 is an apocalyptic number.

172454189018 is a deficient number, since it is larger than the sum of its proper divisors (88807024678).

172454189018 is a wasteful number, since it uses less digits than its factorization.

172454189018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61309.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 172454189018 in words is "one hundred seventy-two billion, four hundred fifty-four million, one hundred eighty-nine thousand, eighteen".