111556161651007 has 4 divisors (see below), whose sum is σ = 113084328249040. Its totient is φ = 110027995052976.

The previous prime is 111556161650953. The next prime is 111556161651059. The reversal of 111556161651007 is 700156161655111.

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

It is a cyclic number.

It is not a de Polignac number, because 111556161651007 - 2¹¹ = 111556161648959 is a prime.

It is a super-2 number, since 2×111556161651007² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111556161651107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764083298907 + ... + 764083299052.

It is an arithmetic number, because the mean of its divisors is an integer number (28271082062260).

Almost surely, 2^{111556161651007} is an apocalyptic number.

111556161651007 is a deficient number, since it is larger than the sum of its proper divisors (1528166598033).

111556161651007 is an equidigital number, since it uses as much as digits as its factorization.

111556161651007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528166598032.

The product of its (nonzero) digits is 189000, while the sum is 46.

The spelling of 111556161651007 in words is "one hundred eleven trillion, five hundred fifty-six billion, one hundred sixty-one million, six hundred fifty-one thousand, seven".