1115556556 has 6 divisors (see below), whose sum is σ = 1952223980. Its totient is φ = 557778276.

The previous prime is 1115556503. The next prime is 1115556571. The reversal of 1115556556 is 6556555111.

It is a super-2 number, since 2×1115556556² = 2488932859269162272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139444566 + ... + 139444573.

Almost surely, 2^1115556556 is an apocalyptic number.

It is an amenable number.

1115556556 is a deficient number, since it is larger than the sum of its proper divisors (836667424).

1115556556 is a wasteful number, since it uses less digits than its factorization.

1115556556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278889143 (or 278889141 counting only the distinct ones).

The product of its digits is 112500, while the sum is 40.

The square root of 1115556556 is about 33399.9484430740. The cubic root of 1115556556 is about 1037.1236336692.

The spelling of 1115556556 in words is "one billion, one hundred fifteen million, five hundred fifty-six thousand, five hundred fifty-six".