128523684004 has 27 divisors (see below), whose sum is σ = 227899969857. Its totient is φ = 63420437808.

The previous prime is 128523683989. The next prime is 128523684059. The reversal of 128523684004 is 400486325821.

It is a happy number.

The square root of 128523684004 is 358502.

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

It can be written as a sum of positive squares in only one way, i.e., 5491106404 + 123032577600 = 74102^2 + 350760^2 .

It is a Duffinian number.

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, 56642182 + ... + 56644450.

Almost surely, 2^128523684004 is an apocalyptic number.

128523684004 is the 358502-nd square number.

It is an amenable number.

128523684004 is a deficient number, since it is larger than the sum of its proper divisors (99376285853).

128523684004 is an frugal number, since it uses more digits than its factorization.

128523684004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700 (or 2350 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 43.

The spelling of 128523684004 in words is "one hundred twenty-eight billion, five hundred twenty-three million, six hundred eighty-four thousand, four".