1144662643 has 8 divisors (see below), whose sum is σ = 1201034016. Its totient is φ = 1088841600.

The previous prime is 1144662613. The next prime is 1144662661. The reversal of 1144662643 is 3462664411.

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 1144662643 - 2⁵ = 1144662611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144662613) 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, 133318 + ... + 141643.

It is an arithmetic number, because the mean of its divisors is an integer number (150129252).

Almost surely, 2^1144662643 is an apocalyptic number.

1144662643 is a deficient number, since it is larger than the sum of its proper divisors (56371373).

1144662643 is a wasteful number, since it uses less digits than its factorization.

1144662643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275165.

The product of its digits is 82944, while the sum is 37.

The square root of 1144662643 is about 33832.8633579838. The cubic root of 1144662643 is about 1046.0662005514.

The spelling of 1144662643 in words is "one billion, one hundred forty-four million, six hundred sixty-two thousand, six hundred forty-three".