1155111500019 has 4 divisors (see below), whose sum is σ = 1540148666696. Its totient is φ = 770074333344.

The previous prime is 1155111500017. The next prime is 1155111500027. The reversal of 1155111500019 is 9100051115511.

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

It is not a de Polignac number, because 1155111500019 - 2¹ = 1155111500017 is a prime.

It is a super-2 number, since 2×1155111500019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155111500017) by changing a digit.

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, 192518583334 + ... + 192518583339.

It is an arithmetic number, because the mean of its divisors is an integer number (385037166674).

Almost surely, 2^{1155111500019} is an apocalyptic number.

1155111500019 is a deficient number, since it is larger than the sum of its proper divisors (385037166677).

1155111500019 is an equidigital number, since it uses as much as digits as its factorization.

1155111500019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385037166676.

The product of its (nonzero) digits is 1125, while the sum is 30.

The spelling of 1155111500019 in words is "one trillion, one hundred fifty-five billion, one hundred eleven million, five hundred thousand, nineteen".