7173127665 has 256 divisors, whose sum is σ = 15482880000. Its totient is φ = 3111955200.

The previous prime is 7173127649. The next prime is 7173127667. The reversal of 7173127665 is 5667213717.

7173127665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7173127665 - 2⁴ = 7173127649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7173127665.

It is not an unprimeable number, because it can be changed into a prime (7173127667) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 51605166 + ... + 51605304.

It is an arithmetic number, because the mean of its divisors is an integer number (60480000).

Almost surely, 2^7173127665 is an apocalyptic number.

It is an amenable number.

7173127665 is an abundant number, since it is smaller than the sum of its proper divisors (8309752335).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7173127665 is a wasteful number, since it uses less digits than its factorization.

7173127665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 267 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 7173127665 is about 84694.3189653238. The cubic root of 7173127665 is about 1928.5734637368.

The spelling of 7173127665 in words is "seven billion, one hundred seventy-three million, one hundred twenty-seven thousand, six hundred sixty-five".