128506365472 has 48 divisors (see below), whose sum is σ = 255394422360. Its totient is φ = 63647152128.

The previous prime is 128506365467. The next prime is 128506365487. The reversal of 128506365472 is 274563605821.

It can be written as a sum of positive squares in 4 ways, for example, as 127303385616 + 1202979856 = 356796^2 + 34684^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1399108 + ... + 1488124.

Almost surely, 2^128506365472 is an apocalyptic number.

It is an amenable number.

128506365472 is a deficient number, since it is larger than the sum of its proper divisors (126888056888).

128506365472 is a wasteful number, since it uses less digits than its factorization.

128506365472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89453 (or 89445 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 128506365472 in words is "one hundred twenty-eight billion, five hundred six million, three hundred sixty-five thousand, four hundred seventy-two".