69728707647 has 6 divisors (see below), whose sum is σ = 100719244392. Its totient is φ = 46485805092.

The previous prime is 69728707637. The next prime is 69728707691. The reversal of 69728707647 is 74670782796.

It is not a de Polignac number, because 69728707647 - 2¹⁰ = 69728706623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69728707637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3873817083 + ... + 3873817100.

It is an arithmetic number, because the mean of its divisors is an integer number (16786540732).

Almost surely, 2^69728707647 is an apocalyptic number.

69728707647 is a deficient number, since it is larger than the sum of its proper divisors (30990536745).

69728707647 is a wasteful number, since it uses less digits than its factorization.

69728707647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7747634189 (or 7747634186 counting only the distinct ones).

The product of its (nonzero) digits is 49787136, while the sum is 63.

The spelling of 69728707647 in words is "sixty-nine billion, seven hundred twenty-eight million, seven hundred seven thousand, six hundred forty-seven".