5172172545 has 32 divisors (see below), whose sum is σ = 8327992320. Its totient is φ = 2741043200.

The previous prime is 5172172543. The next prime is 5172172573. The reversal of 5172172545 is 5452712715.

It is not a de Polignac number, because 5172172545 - 2¹ = 5172172543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5172172543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1845145 + ... + 1847945.

It is an arithmetic number, because the mean of its divisors is an integer number (260249760).

Almost surely, 2^5172172545 is an apocalyptic number.

It is an amenable number.

5172172545 is a deficient number, since it is larger than the sum of its proper divisors (3155819775).

5172172545 is a wasteful number, since it uses less digits than its factorization.

5172172545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3545.

The product of its digits is 98000, while the sum is 39.

The square root of 5172172545 is about 71917.8179938741. The cubic root of 5172172545 is about 1729.3822674514.

The spelling of 5172172545 in words is "five billion, one hundred seventy-two million, one hundred seventy-two thousand, five hundred forty-five".