6535393789 has 4 divisors (see below), whose sum is σ = 6535590940. Its totient is φ = 6535196640.

The previous prime is 6535393751. The next prime is 6535393807. The reversal of 6535393789 is 9873935356.

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 5371424100 + 1163969689 = 73290^2 + 34117^2 .

It is a cyclic number.

It is not a de Polignac number, because 6535393789 - 2¹⁷ = 6535262717 is a prime.

It is a super-2 number, since 2×6535393789² = 85422743954599553042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6535393889) 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 3 ways as a sum of consecutive naturals, for example, 35322 + ... + 119659.

It is an arithmetic number, because the mean of its divisors is an integer number (1633897735).

Almost surely, 2^6535393789 is an apocalyptic number.

It is an amenable number.

6535393789 is a deficient number, since it is larger than the sum of its proper divisors (197151).

6535393789 is a wasteful number, since it uses less digits than its factorization.

6535393789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197150.

The product of its digits is 18370800, while the sum is 58.

The square root of 6535393789 is about 80841.7824457131. The cubic root of 6535393789 is about 1869.6368258662.

The spelling of 6535393789 in words is "six billion, five hundred thirty-five million, three hundred ninety-three thousand, seven hundred eighty-nine".