172318820001 has 16 divisors (see below), whose sum is σ = 241860675840. Its totient is φ = 108828573840.

The previous prime is 172318819997. The next prime is 172318820071. The reversal of 172318820001 is 100028813271.

It is not a de Polignac number, because 172318820001 - 2² = 172318819997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172318820071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1956646 + ... + 2042816.

It is an arithmetic number, because the mean of its divisors is an integer number (15116292240).

Almost surely, 2^172318820001 is an apocalyptic number.

It is an amenable number.

172318820001 is a deficient number, since it is larger than the sum of its proper divisors (69541855839).

172318820001 is a wasteful number, since it uses less digits than its factorization.

172318820001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121276.

The product of its (nonzero) digits is 5376, while the sum is 33.

The spelling of 172318820001 in words is "one hundred seventy-two billion, three hundred eighteen million, eight hundred twenty thousand, one".