75494338517 has 4 divisors (see below), whose sum is σ = 81301595340. Its totient is φ = 69687081696.

The previous prime is 75494338511. The next prime is 75494338559. The reversal of 75494338517 is 71583349457.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71583349457 = 157 ⋅455944901.

It can be written as a sum of positive squares in 2 ways, for example, as 39175889041 + 36318449476 = 197929^2 + 190574^2 .

It is a cyclic number.

It is not a de Polignac number, because 75494338517 - 2¹⁴ = 75494322133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75494338511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2903628392 + ... + 2903628417.

It is an arithmetic number, because the mean of its divisors is an integer number (20325398835).

Almost surely, 2^75494338517 is an apocalyptic number.

It is an amenable number.

75494338517 is a deficient number, since it is larger than the sum of its proper divisors (5807256823).

75494338517 is a wasteful number, since it uses less digits than its factorization.

75494338517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5807256822.

The product of its digits is 12700800, while the sum is 56.

The spelling of 75494338517 in words is "seventy-five billion, four hundred ninety-four million, three hundred thirty-eight thousand, five hundred seventeen".