128565573432976 has 45 divisors (see below), whose sum is σ = 249753865011483. Its totient is φ = 64113409574400.

The previous prime is 128565573432913. The next prime is 128565573433001. The reversal of 128565573432976 is 679234375565821.

The square root of 128565573432976 is 11338676.

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

It can be written as a sum of positive squares in 4 ways, for example, as 33187692287376 + 95377881145600 = 5760876^2 + 9766160^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128565573432899 and 128565573432908.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18187232770 + ... + 18187239838.

Almost surely, 2^{128565573432976} is an apocalyptic number.

128565573432976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

128565573432976 is the 11338676-th square number.

It is an amenable number.

128565573432976 is a deficient number, since it is larger than the sum of its proper divisors (121188291578507).

128565573432976 is an frugal number, since it uses more digits than its factorization.

128565573432976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14948 (or 7472 counting only the distinct ones).

The product of its digits is 2286144000, while the sum is 73.

The spelling of 128565573432976 in words is "one hundred twenty-eight trillion, five hundred sixty-five billion, five hundred seventy-three million, four hundred thirty-two thousand, nine hundred seventy-six".