111110661554 has 8 divisors (see below), whose sum is σ = 166745401200. Its totient is φ = 55528861156.

The previous prime is 111110661551. The next prime is 111110661569. The reversal of 111110661554 is 455166011111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×111110661554² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111110661554.

It is not an unprimeable number, because it can be changed into a prime (111110661551) 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, 13229564 + ... + 13237959.

It is an arithmetic number, because the mean of its divisors is an integer number (20843175150).

Almost surely, 2^111110661554 is an apocalyptic number.

111110661554 is a deficient number, since it is larger than the sum of its proper divisors (55634739646).

111110661554 is a wasteful number, since it uses less digits than its factorization.

111110661554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26469624.

The product of its (nonzero) digits is 3600, while the sum is 32.

Adding to 111110661554 its reverse (455166011111), we get a palindrome (566276672665).

The spelling of 111110661554 in words is "one hundred eleven billion, one hundred ten million, six hundred sixty-one thousand, five hundred fifty-four".