1099539465538 has 4 divisors (see below), whose sum is σ = 1649309198310. Its totient is φ = 549769732768.

The previous prime is 1099539465517. The next prime is 1099539465599. The reversal of 1099539465538 is 8355649359901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1098507321409 + 1032144129 = 1048097^2 + 32127^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274884866383 + ... + 274884866386.

Almost surely, 2^{1099539465538} is an apocalyptic number.

1099539465538 is a deficient number, since it is larger than the sum of its proper divisors (549769732772).

1099539465538 is an equidigital number, since it uses as much as digits as its factorization.

1099539465538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549769732771.

The product of its (nonzero) digits is 157464000, while the sum is 67.

The spelling of 1099539465538 in words is "one trillion, ninety-nine billion, five hundred thirty-nine million, four hundred sixty-five thousand, five hundred thirty-eight".