11528780002 has 8 divisors (see below), whose sum is σ = 17889486300. Its totient is φ = 5565617904.

The previous prime is 11528779991. The next prime is 11528780033. The reversal of 11528780002 is 20008782511.

It can be written as a sum of positive squares in 2 ways, for example, as 11157485641 + 371294361 = 105629^2 + 19269^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11528780002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99385977 + ... + 99386092.

Almost surely, 2^11528780002 is an apocalyptic number.

11528780002 is a deficient number, since it is larger than the sum of its proper divisors (6360706298).

11528780002 is a wasteful number, since it uses less digits than its factorization.

11528780002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198772100.

The product of its (nonzero) digits is 8960, while the sum is 34.

The spelling of 11528780002 in words is "eleven billion, five hundred twenty-eight million, seven hundred eighty thousand, two".