1144648642 has 8 divisors (see below), whose sum is σ = 1732167756. Its totient is φ = 567259392.

The previous prime is 1144648639. The next prime is 1144648649. The reversal of 1144648642 is 2468464411.

It can be written as a sum of positive squares in 2 ways, for example, as 869719081 + 274929561 = 29491^2 + 16581^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1144648595 and 1144648604.

It is not an unprimeable number, because it can be changed into a prime (1144648649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2532183 + ... + 2532634.

Almost surely, 2^1144648642 is an apocalyptic number.

1144648642 is a deficient number, since it is larger than the sum of its proper divisors (587519114).

1144648642 is a wasteful number, since it uses less digits than its factorization.

1144648642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064932.

The product of its digits is 147456, while the sum is 40.

The square root of 1144648642 is about 33832.6564431468. The cubic root of 1144648642 is about 1046.0619355298.

The spelling of 1144648642 in words is "one billion, one hundred forty-four million, six hundred forty-eight thousand, six hundred forty-two".