75172865989 has 16 divisors (see below), whose sum is σ = 85998035200. Its totient is φ = 65135088576.

The previous prime is 75172865983. The next prime is 75172865993. The reversal of 75172865989 is 98956827157.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75172865989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75172865983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1369149 + ... + 1422994.

It is an arithmetic number, because the mean of its divisors is an integer number (5374877200).

Almost surely, 2^75172865989 is an apocalyptic number.

It is an amenable number.

75172865989 is a deficient number, since it is larger than the sum of its proper divisors (10825169211).

75172865989 is a wasteful number, since it uses less digits than its factorization.

75172865989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792284.

The product of its digits is 76204800, while the sum is 67.

The spelling of 75172865989 in words is "seventy-five billion, one hundred seventy-two million, eight hundred sixty-five thousand, nine hundred eighty-nine".