3128172263705 has 16 divisors (see below), whose sum is σ = 3774285241344. Its totient is φ = 2488891192320.

The previous prime is 3128172263701. The next prime is 3128172263747. The reversal of 3128172263705 is 5073622718213.

It is not a de Polignac number, because 3128172263705 - 2² = 3128172263701 is a prime.

It is a super-2 number, since 2×3128172263705² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3128172263705.

It is not an unprimeable number, because it can be changed into a prime (3128172263701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4040057 + ... + 4751673.

It is an arithmetic number, because the mean of its divisors is an integer number (235892827584).

Almost surely, 2^{3128172263705} is an apocalyptic number.

It is an amenable number.

3128172263705 is a deficient number, since it is larger than the sum of its proper divisors (646112977639).

3128172263705 is a wasteful number, since it uses less digits than its factorization.

3128172263705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716416.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 3128172263705 in words is "three trillion, one hundred twenty-eight billion, one hundred seventy-two million, two hundred sixty-three thousand, seven hundred five".