775134093889 has 27 divisors (see below), whose sum is σ = 820568144739. Its totient is φ = 732154777200.

The previous prime is 775134093871. The next prime is 775134093893. The reversal of 775134093889 is 988390431577.

The square root of 775134093889 is 880417.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 744739658289 + 30394435600 = 862983^2 + 174340^2 .

It is not a de Polignac number, because 775134093889 - 2²³ = 775125705281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 775134093889.

It is not an unprimeable number, because it can be changed into a prime (775134093809) 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 26 ways as a sum of consecutive naturals, for example, 2045208502 + ... + 2045208880.

Almost surely, 2^775134093889 is an apocalyptic number.

775134093889 is the 880417-th square number.

775134093889 is the 440209-th centered octagonal number.

It is an amenable number.

775134093889 is a deficient number, since it is larger than the sum of its proper divisors (45434050850).

775134093889 is an frugal number, since it uses more digits than its factorization.

775134093889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 64.

Multiplying 775134093889 by its sum of digits (64), we get a square (49608582008896 = 7043336²).

The spelling of 775134093889 in words is "seven hundred seventy-five billion, one hundred thirty-four million, ninety-three thousand, eight hundred eighty-nine".