75373217165 has 4 divisors (see below), whose sum is σ = 90447860604. Its totient is φ = 60298573728.

The previous prime is 75373217141. The next prime is 75373217201. The reversal of 75373217165 is 56171237357.

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 57245826121 + 18127391044 = 239261^2 + 134638^2 .

It is a cyclic number.

It is not a de Polignac number, because 75373217165 - 2²⁰ = 75372168589 is a prime.

It is a super-2 number, since 2×75373217165² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 7537321712 + ... + 7537321721.

It is an arithmetic number, because the mean of its divisors is an integer number (22611965151).

Almost surely, 2^75373217165 is an apocalyptic number.

It is an amenable number.

75373217165 is a deficient number, since it is larger than the sum of its proper divisors (15074643439).

75373217165 is a wasteful number, since it uses less digits than its factorization.

75373217165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15074643438.

The product of its digits is 926100, while the sum is 47.

The spelling of 75373217165 in words is "seventy-five billion, three hundred seventy-three million, two hundred seventeen thousand, one hundred sixty-five".