75639918389 has 4 divisors (see below), whose sum is σ = 86445621024. Its totient is φ = 64834215756.

The previous prime is 75639918379. The next prime is 75639918397. The reversal of 75639918389 is 98381993657.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98381993657 = 190607 ⋅516151.

It is a cyclic number.

It is not a de Polignac number, because 75639918389 - 2²⁸ = 75371482933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75639918379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5402851307 + ... + 5402851320.

It is an arithmetic number, because the mean of its divisors is an integer number (21611405256).

Almost surely, 2^75639918389 is an apocalyptic number.

It is an amenable number.

75639918389 is a deficient number, since it is larger than the sum of its proper divisors (10805702635).

75639918389 is a wasteful number, since it uses less digits than its factorization.

75639918389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10805702634.

The product of its digits is 88179840, while the sum is 68.

The spelling of 75639918389 in words is "seventy-five billion, six hundred thirty-nine million, nine hundred eighteen thousand, three hundred eighty-nine".