128647443796 has 12 divisors (see below), whose sum is σ = 225667787380. Its totient is φ = 64170933120.

The previous prime is 128647443761. The next prime is 128647443797. The reversal of 128647443796 is 697344746821.

It can be written as a sum of positive squares in 2 ways, for example, as 3692263696 + 124955180100 = 60764^2 + 353490^2 .

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128647443797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38195301 + ... + 38198668.

Almost surely, 2^128647443796 is an apocalyptic number.

It is an amenable number.

128647443796 is a deficient number, since it is larger than the sum of its proper divisors (97020343584).

128647443796 is a wasteful number, since it uses less digits than its factorization.

128647443796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76394394 (or 76394392 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 61.

The spelling of 128647443796 in words is "one hundred twenty-eight billion, six hundred forty-seven million, four hundred forty-three thousand, seven hundred ninety-six".