1155138788456 has 16 divisors (see below), whose sum is σ = 2165933441700. Its totient is φ = 577556537344.

The previous prime is 1155138788437. The next prime is 1155138788477. The reversal of 1155138788456 is 6548878315511.

It can be written as a sum of positive squares in 2 ways, for example, as 864546636100 + 290592152356 = 929810^2 + 539066^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1219775 + ... + 1948878.

Almost surely, 2^{1155138788456} is an apocalyptic number.

It is an amenable number.

1155138788456 is a deficient number, since it is larger than the sum of its proper divisors (1010794653244).

1155138788456 is a wasteful number, since it uses less digits than its factorization.

1155138788456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3214228 (or 3214224 counting only the distinct ones).

The product of its digits is 32256000, while the sum is 62.

The spelling of 1155138788456 in words is "one trillion, one hundred fifty-five billion, one hundred thirty-eight million, seven hundred eighty-eight thousand, four hundred fifty-six".