5172203868385 has 4 divisors (see below), whose sum is σ = 6206644642068. Its totient is φ = 4137763094704.

The previous prime is 5172203868353. The next prime is 5172203868413. The reversal of 5172203868385 is 5838683022715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3152670131776 + 2019533736609 = 1775576^2 + 1421103^2 .

It is a cyclic number.

It is not a de Polignac number, because 5172203868385 - 2⁵ = 5172203868353 is a prime.

It is a super-2 number, since 2×5172203868385² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517220386834 + ... + 517220386843.

It is an arithmetic number, because the mean of its divisors is an integer number (1551661160517).

Almost surely, 2^{5172203868385} is an apocalyptic number.

It is an amenable number.

5172203868385 is a deficient number, since it is larger than the sum of its proper divisors (1034440773683).

5172203868385 is a wasteful number, since it uses less digits than its factorization.

5172203868385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034440773682.

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 5172203868385 in words is "five trillion, one hundred seventy-two billion, two hundred three million, eight hundred sixty-eight thousand, three hundred eighty-five".