69728782285 has 8 divisors (see below), whose sum is σ = 84158207640. Its totient is φ = 55460579904.

The previous prime is 69728782229. The next prime is 69728782289. The reversal of 69728782285 is 58228782796.

It can be written as a sum of positive squares in 4 ways, for example, as 40795112484 + 28933669801 = 201978^2 + 170099^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69728782285 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69728782289) 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 7 ways as a sum of consecutive naturals, for example, 40304790 + ... + 40306519.

It is an arithmetic number, because the mean of its divisors is an integer number (10519775955).

Almost surely, 2^69728782285 is an apocalyptic number.

It is an amenable number.

69728782285 is a deficient number, since it is larger than the sum of its proper divisors (14429425355).

69728782285 is a wasteful number, since it uses less digits than its factorization.

69728782285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80611487.

The product of its digits is 54190080, while the sum is 64.

The spelling of 69728782285 in words is "sixty-nine billion, seven hundred twenty-eight million, seven hundred eighty-two thousand, two hundred eighty-five".