1147556556 has 36 divisors (see below), whose sum is σ = 2913456000. Its totient is φ = 380845728.

The previous prime is 1147556539. The next prime is 1147556561. The reversal of 1147556556 is 6556557411.

It is a happy number.

1147556556 is a `hidden beast` number, since 1 + 1 + 47 + 5 + 56 + 556 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1147556556² = 2633772098437162272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61356 + ... + 77843.

Almost surely, 2^1147556556 is an apocalyptic number.

It is an amenable number.

1147556556 is an abundant number, since it is smaller than the sum of its proper divisors (1765899444).

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

1147556556 is a wasteful number, since it uses less digits than its factorization.

1147556556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139438 (or 139433 counting only the distinct ones).

The product of its digits is 630000, while the sum is 45.

The square root of 1147556556 is about 33875.6041422142. The cubic root of 1147556556 is about 1046.9470065104.

The spelling of 1147556556 in words is "one billion, one hundred forty-seven million, five hundred fifty-six thousand, five hundred fifty-six".