172745367918 has 16 divisors (see below), whose sum is σ = 345494873856. Its totient is φ = 57581099640.

The previous prime is 172745367917. The next prime is 172745367923. The reversal of 172745367918 is 819763547271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172745367917) by changing a digit.

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, 749355 + ... + 952377.

It is an arithmetic number, because the mean of its divisors is an integer number (21593429616).

Almost surely, 2^172745367918 is an apocalyptic number.

172745367918 is an abundant number, since it is smaller than the sum of its proper divisors (172749505938).

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

172745367918 is a wasteful number, since it uses less digits than its factorization.

172745367918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344839.

The product of its digits is 17781120, while the sum is 60.

The spelling of 172745367918 in words is "one hundred seventy-two billion, seven hundred forty-five million, three hundred sixty-seven thousand, nine hundred eighteen".