11556087381028 has 6 divisors (see below), whose sum is σ = 20223152916806. Its totient is φ = 5778043690512.

The previous prime is 11556087380993. The next prime is 11556087381053. The reversal of 11556087381028 is 82018378065511.

It can be written as a sum of positive squares in only one way, i.e., 6297128510464 + 5258958870564 = 2509408^2 + 2293242^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11556087381028.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1444510922625 + ... + 1444510922632.

Almost surely, 2^{11556087381028} is an apocalyptic number.

It is an amenable number.

11556087381028 is a deficient number, since it is larger than the sum of its proper divisors (8667065535778).

11556087381028 is a wasteful number, since it uses less digits than its factorization.

11556087381028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889021845261 (or 2889021845259 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 55.

The spelling of 11556087381028 in words is "eleven trillion, five hundred fifty-six billion, eighty-seven million, three hundred eighty-one thousand, twenty-eight".