1144554643 has 8 divisors (see below), whose sum is σ = 1157931008. Its totient is φ = 1131222024.

The previous prime is 1144554641. The next prime is 1144554659. The reversal of 1144554643 is 3464554411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1144554643 - 2¹ = 1144554641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144554641) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 43246 + ... + 64492.

It is an arithmetic number, because the mean of its divisors is an integer number (144741376).

Almost surely, 2^1144554643 is an apocalyptic number.

1144554643 is a deficient number, since it is larger than the sum of its proper divisors (13376365).

1144554643 is a wasteful number, since it uses less digits than its factorization.

1144554643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21873.

The product of its digits is 115200, while the sum is 37.

The square root of 1144554643 is about 33831.2672390497. The cubic root of 1144554643 is about 1046.0333004057.

The spelling of 1144554643 in words is "one billion, one hundred forty-four million, five hundred fifty-four thousand, six hundred forty-three".