69135865969 has 3 divisors (see below), whose sum is σ = 69136128907. Its totient is φ = 69135603032.

The previous prime is 69135865963. The next prime is 69135865973. The reversal of 69135865969 is 96956853196.

The square root of 69135865969 is 262937.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 20697138225 + 48438727744 = 143865^2 + 220088^2 .

It is not a de Polignac number, because 69135865969 - 2¹⁵ = 69135833201 is a prime.

It is a super-2 number, since 2×69135865969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69135865963) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 131469 + ... + 394405.

Almost surely, 2^69135865969 is an apocalyptic number.

69135865969 is the 262937-th square number.

69135865969 is the 131469-th centered octagonal number.

It is an amenable number.

69135865969 is a deficient number, since it is larger than the sum of its proper divisors (262938).

69135865969 is an frugal number, since it uses more digits than its factorization.

69135865969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525874 (or 262937 counting only the distinct ones).

The product of its digits is 94478400, while the sum is 67.

The spelling of 69135865969 in words is "sixty-nine billion, one hundred thirty-five million, eight hundred sixty-five thousand, nine hundred sixty-nine".