128606869924 has 45 divisors (see below), whose sum is σ = 244046549621. Its totient is φ = 59301072480.

The previous prime is 128606869901. The next prime is 128606869967. The reversal of 128606869924 is 429968606821.

The square root of 128606869924 is 358618.

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

It can be written as a sum of positive squares in 7 ways, for example, as 125116423524 + 3490446400 = 353718^2 + 59080^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 121212354 + ... + 121213414.

Almost surely, 2^128606869924 is an apocalyptic number.

128606869924 is the 358618-th square number.

It is an amenable number.

128606869924 is a deficient number, since it is larger than the sum of its proper divisors (115439679697).

128606869924 is an frugal number, since it uses more digits than its factorization.

128606869924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 128606869924 in words is "one hundred twenty-eight billion, six hundred six million, eight hundred sixty-nine thousand, nine hundred twenty-four".