111110661552 has 40 divisors (see below), whose sum is σ = 313130047680. Its totient is φ = 33669897280.

The previous prime is 111110661551. The next prime is 111110661569. The reversal of 111110661552 is 255166011111.

It is a super-2 number, since 2×111110661552² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 105217902 + ... + 105218957.

It is an arithmetic number, because the mean of its divisors is an integer number (7828251192).

Almost surely, 2^111110661552 is an apocalyptic number.

111110661552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111110661552 is an abundant number, since it is smaller than the sum of its proper divisors (202019386128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111110661552 is a wasteful number, since it uses less digits than its factorization.

111110661552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210436881 (or 210436875 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 30.

Adding to 111110661552 its reverse (255166011111), we get a palindrome (366276672663).

The spelling of 111110661552 in words is "one hundred eleven billion, one hundred ten million, six hundred sixty-one thousand, five hundred fifty-two".