1147556663 has 16 divisors (see below), whose sum is σ = 1263535872. Its totient is φ = 1033560000.

The previous prime is 1147556659. The next prime is 1147556671. The reversal of 1147556663 is 3666557411.

It is not a de Polignac number, because 1147556663 - 2² = 1147556659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147556563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 868043 + ... + 869363.

It is an arithmetic number, because the mean of its divisors is an integer number (78970992).

Almost surely, 2^1147556663 is an apocalyptic number.

1147556663 is a deficient number, since it is larger than the sum of its proper divisors (115979209).

1147556663 is a wasteful number, since it uses less digits than its factorization.

1147556663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006.

The product of its digits is 453600, while the sum is 44.

The square root of 1147556663 is about 33875.6057215218. The cubic root of 1147556663 is about 1046.9470390501.

The spelling of 1147556663 in words is "one billion, one hundred forty-seven million, five hundred fifty-six thousand, six hundred sixty-three".