1109697995555 has 4 divisors (see below), whose sum is σ = 1331637594672. Its totient is φ = 887758396440.

The previous prime is 1109697995519. The next prime is 1109697995587. The reversal of 1109697995555 is 5555997969011.

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

It is not a de Polignac number, because 1109697995555 - 2⁸ = 1109697995299 is a prime.

It is a Duffinian number.

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, 110969799551 + ... + 110969799560.

It is an arithmetic number, because the mean of its divisors is an integer number (332909398668).

Almost surely, 2^{1109697995555} is an apocalyptic number.

1109697995555 is a deficient number, since it is larger than the sum of its proper divisors (221939599117).

1109697995555 is an equidigital number, since it uses as much as digits as its factorization.

1109697995555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221939599116.

The product of its (nonzero) digits is 172226250, while the sum is 71.

The spelling of 1109697995555 in words is "one trillion, one hundred nine billion, six hundred ninety-seven million, nine hundred ninety-five thousand, five hundred fifty-five".