111551606005 has 16 divisors (see below), whose sum is σ = 153029049984. Its totient is φ = 76470534720.

The previous prime is 111551605933. The next prime is 111551606011. The reversal of 111551606005 is 500606155111.

It is not a de Polignac number, because 111551606005 - 2¹⁹ = 111551081717 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 15 ways as a sum of consecutive naturals, for example, 334302 + ... + 578671.

It is an arithmetic number, because the mean of its divisors is an integer number (9564315624).

Almost surely, 2^111551606005 is an apocalyptic number.

It is an amenable number.

111551606005 is a deficient number, since it is larger than the sum of its proper divisors (41477443979).

111551606005 is an equidigital number, since it uses as much as digits as its factorization.

111551606005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916476.

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 111551606005 in words is "one hundred eleven billion, five hundred fifty-one million, six hundred six thousand, five".