111555959005 has 4 divisors (see below), whose sum is σ = 133867150812. Its totient is φ = 89244767200.

The previous prime is 111555958991. The next prime is 111555959087. The reversal of 111555959005 is 500959555111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500959555111 = 211 ⋅2374215901.

It can be written as a sum of positive squares in 2 ways, for example, as 17668258084 + 93887700921 = 132922^2 + 306411^2 .

It is a de Polignac number, because none of the positive numbers 2^k-111555959005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11155595896 + ... + 11155595905.

It is an arithmetic number, because the mean of its divisors is an integer number (33466787703).

Almost surely, 2^111555959005 is an apocalyptic number.

It is an amenable number.

111555959005 is a deficient number, since it is larger than the sum of its proper divisors (22311191807).

111555959005 is an equidigital number, since it uses as much as digits as its factorization.

111555959005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22311191806.

The product of its (nonzero) digits is 253125, while the sum is 46.

The spelling of 111555959005 in words is "one hundred eleven billion, five hundred fifty-five million, nine hundred fifty-nine thousand, five".