111616061651 has 4 divisors (see below), whose sum is σ = 111618173304. Its totient is φ = 111613950000.

The previous prime is 111616061617. The next prime is 111616061663. The reversal of 111616061651 is 156160616111.

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 111616061651 - 2¹⁴ = 111616045267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111616091651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974450 + ... + 1082951.

It is an arithmetic number, because the mean of its divisors is an integer number (27904543326).

Almost surely, 2^111616061651 is an apocalyptic number.

111616061651 is a deficient number, since it is larger than the sum of its proper divisors (2111653).

111616061651 is an equidigital number, since it uses as much as digits as its factorization.

111616061651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111652.

The product of its (nonzero) digits is 6480, while the sum is 35.

Adding to 111616061651 its reverse (156160616111), we get a palindrome (267776677762).

The spelling of 111616061651 in words is "one hundred eleven billion, six hundred sixteen million, sixty-one thousand, six hundred fifty-one".