87755747689 has 4 divisors (see below), whose sum is σ = 88624616580. Its totient is φ = 86886878800.

The previous prime is 87755747669. The next prime is 87755747707. The reversal of 87755747689 is 98674755778.

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 67869107289 + 19886640400 = 260517^2 + 141020^2 .

It is a cyclic number.

It is not a de Polignac number, because 87755747689 - 2⁵ = 87755747657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87755747669) 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, 434434294 + ... + 434434495.

It is an arithmetic number, because the mean of its divisors is an integer number (22156154145).

Almost surely, 2^87755747689 is an apocalyptic number.

It is an amenable number.

87755747689 is a deficient number, since it is larger than the sum of its proper divisors (868868891).

87755747689 is a wasteful number, since it uses less digits than its factorization.

87755747689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868868890.

The product of its digits is 829785600, while the sum is 73.

The spelling of 87755747689 in words is "eighty-seven billion, seven hundred fifty-five million, seven hundred forty-seven thousand, six hundred eighty-nine".