69091728313 has 4 divisors (see below), whose sum is σ = 69092469108. Its totient is φ = 69090987520.

The previous prime is 69091728289. The next prime is 69091728373. The reversal of 69091728313 is 31382719096.

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 2 ways, for example, as 59356551424 + 9735176889 = 243632^2 + 98667^2 .

It is a cyclic number.

It is not a de Polignac number, because 69091728313 - 2²⁵ = 69058173881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69091728373) 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, 206248 + ... + 425113.

It is an arithmetic number, because the mean of its divisors is an integer number (17273117277).

Almost surely, 2^69091728313 is an apocalyptic number.

It is an amenable number.

69091728313 is a deficient number, since it is larger than the sum of its proper divisors (740795).

69091728313 is a wasteful number, since it uses less digits than its factorization.

69091728313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740794.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 69091728313 in words is "sixty-nine billion, ninety-one million, seven hundred twenty-eight thousand, three hundred thirteen".