1147643555 has 16 divisors (see below), whose sum is σ = 1416628224. Its totient is φ = 892036320.

The previous prime is 1147643543. The next prime is 1147643557. The reversal of 1147643555 is 5553467411.

It is a happy number.

It is not a de Polignac number, because 1147643555 - 2¹² = 1147639459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1147643557) 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, 27092 + ... + 55038.

It is an arithmetic number, because the mean of its divisors is an integer number (88539264).

Almost surely, 2^1147643555 is an apocalyptic number.

1147643555 is a deficient number, since it is larger than the sum of its proper divisors (268984669).

1147643555 is a wasteful number, since it uses less digits than its factorization.

1147643555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28186.

The product of its digits is 252000, while the sum is 41.

The square root of 1147643555 is about 33876.8882130576. Note that the first 3 decimals coincide. The cubic root of 1147643555 is about 1046.9734630252.

The spelling of 1147643555 in words is "one billion, one hundred forty-seven million, six hundred forty-three thousand, five hundred fifty-five".