172321240045 has 8 divisors (see below), whose sum is σ = 206787727224. Its totient is φ = 137855499264.

The previous prime is 172321240043. The next prime is 172321240087. The reversal of 172321240045 is 540042123271.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11983461961 + 160337778084 = 109469^2 + 400422^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172321240045 - 2¹ = 172321240043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172321239989 and 172321240016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172321240043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 736177 + ... + 941593.

It is an arithmetic number, because the mean of its divisors is an integer number (25848465903).

Almost surely, 2^172321240045 is an apocalyptic number.

It is an amenable number.

172321240045 is a deficient number, since it is larger than the sum of its proper divisors (34466487179).

172321240045 is a wasteful number, since it uses less digits than its factorization.

172321240045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373199.

The product of its (nonzero) digits is 13440, while the sum is 31.

The spelling of 172321240045 in words is "one hundred seventy-two billion, three hundred twenty-one million, two hundred forty thousand, forty-five".