172472471845 has 8 divisors (see below), whose sum is σ = 206980486776. Its totient is φ = 137968963776.

The previous prime is 172472471837. The next prime is 172472471869. The reversal of 172472471845 is 548174274271.

It can be written as a sum of positive squares in 4 ways, for example, as 11484551556 + 160987920289 = 107166^2 + 401233^2 .

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 172472471845 - 2³ = 172472471837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172472471792 and 172472471801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1041942 + ... + 1196071.

It is an arithmetic number, because the mean of its divisors is an integer number (25872560847).

Almost surely, 2^172472471845 is an apocalyptic number.

It is an amenable number.

172472471845 is a deficient number, since it is larger than the sum of its proper divisors (34508014931).

172472471845 is a wasteful number, since it uses less digits than its factorization.

172472471845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253431.

The product of its digits is 3512320, while the sum is 52.

The spelling of 172472471845 in words is "one hundred seventy-two billion, four hundred seventy-two million, four hundred seventy-one thousand, eight hundred forty-five".