111611342651 has 4 divisors (see below), whose sum is σ = 111612041592. Its totient is φ = 111610643712.

The previous prime is 111611342639. The next prime is 111611342659. The reversal of 111611342651 is 156243116111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 111611342651 - 2¹⁰ = 111611341627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111611342659) 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, 20900 + ... + 472926.

It is an arithmetic number, because the mean of its divisors is an integer number (27903010398).

Almost surely, 2^111611342651 is an apocalyptic number.

111611342651 is a deficient number, since it is larger than the sum of its proper divisors (698941).

111611342651 is an equidigital number, since it uses as much as digits as its factorization.

111611342651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698940.

The product of its digits is 4320, while the sum is 32.

Adding to 111611342651 its reverse (156243116111), we get a palindrome (267854458762).

The spelling of 111611342651 in words is "one hundred eleven billion, six hundred eleven million, three hundred forty-two thousand, six hundred fifty-one".