1111661156 has 6 divisors (see below), whose sum is σ = 1945407030. Its totient is φ = 555830576.

The previous prime is 1111661149. The next prime is 1111661171. The reversal of 1111661156 is 6511661111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1087944256 + 23716900 = 32984^2 + 4870^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138957641 + ... + 138957648.

It is an arithmetic number, because the mean of its divisors is an integer number (324234505).

Almost surely, 2^1111661156 is an apocalyptic number.

It is an amenable number.

1111661156 is a deficient number, since it is larger than the sum of its proper divisors (833745874).

1111661156 is a wasteful number, since it uses less digits than its factorization.

1111661156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277915293 (or 277915291 counting only the distinct ones).

The product of its digits is 1080, while the sum is 29.

The square root of 1111661156 is about 33341.5829858152. The cubic root of 1111661156 is about 1035.9150521922.

The spelling of 1111661156 in words is "one billion, one hundred eleven million, six hundred sixty-one thousand, one hundred fifty-six".