1144665563 has 8 divisors (see below), whose sum is σ = 1156217328. Its totient is φ = 1133129824.

The previous prime is 1144665553. The next prime is 1144665601. The reversal of 1144665563 is 3655664411.

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 1144665563 - 2⁶ = 1144665499 is a prime.

It is a super-2 number, since 2×1144665563² = 2620518502236213938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1144665563.

It is not an unprimeable number, because it can be changed into a prime (1144665503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182345 + ... + 188517.

It is an arithmetic number, because the mean of its divisors is an integer number (144527166).

Almost surely, 2^1144665563 is an apocalyptic number.

1144665563 is a deficient number, since it is larger than the sum of its proper divisors (11551765).

1144665563 is a wasteful number, since it uses less digits than its factorization.

1144665563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8013.

The product of its digits is 259200, while the sum is 41.

The square root of 1144665563 is about 33832.9065112650. The cubic root of 1144665563 is about 1046.0670900451.

The spelling of 1144665563 in words is "one billion, one hundred forty-four million, six hundred sixty-five thousand, five hundred sixty-three".