1144581163 has 16 divisors (see below), whose sum is σ = 1313252352. Its totient is φ = 987948000.

The previous prime is 1144581161. The next prime is 1144581203. The reversal of 1144581163 is 3611854411.

It is a cyclic number.

It is not a de Polignac number, because 1144581163 - 2¹ = 1144581161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144581161) 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, 13593 + ... + 49738.

It is an arithmetic number, because the mean of its divisors is an integer number (82078272).

Almost surely, 2^1144581163 is an apocalyptic number.

1144581163 is a deficient number, since it is larger than the sum of its proper divisors (168671189).

1144581163 is a wasteful number, since it uses less digits than its factorization.

1144581163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63426.

The product of its digits is 11520, while the sum is 34.

The square root of 1144581163 is about 33831.6591818965. The cubic root of 1144581163 is about 1046.0413794110.

The spelling of 1144581163 in words is "one billion, one hundred forty-four million, five hundred eighty-one thousand, one hundred sixty-three".