1144081645 has 16 divisors (see below), whose sum is σ = 1601049600. Its totient is φ = 784511952.

The previous prime is 1144081643. The next prime is 1144081651. The reversal of 1144081645 is 5461804411.

It is a happy number.

It is not a de Polignac number, because 1144081645 - 2¹ = 1144081643 is a prime.

It is a super-3 number, since 3×1144081645³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1144081645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144081643) 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, 331837 + ... + 335266.

It is an arithmetic number, because the mean of its divisors is an integer number (100065600).

Almost surely, 2^1144081645 is an apocalyptic number.

It is an amenable number.

1144081645 is a deficient number, since it is larger than the sum of its proper divisors (456967955).

1144081645 is an frugal number, since it uses more digits than its factorization.

1144081645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667129 (or 667115 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 1144081645 is about 33824.2759715563. The cubic root of 1144081645 is about 1045.8891861764.

The spelling of 1144081645 in words is "one billion, one hundred forty-four million, eighty-one thousand, six hundred forty-five".