1663381144 has 24 divisors (see below), whose sum is σ = 3291634260. Its totient is φ = 787916016.

The previous prime is 1663381127. The next prime is 1663381147. The reversal of 1663381144 is 4411833661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663381147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 285094 + ... + 290869.

Almost surely, 2^1663381144 is an apocalyptic number.

It is an amenable number.

1663381144 is a deficient number, since it is larger than the sum of its proper divisors (1628253116).

1663381144 is a wasteful number, since it uses less digits than its factorization.

1663381144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576007 (or 575984 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 1663381144 is about 40784.5699254019. The cubic root of 1663381144 is about 1184.8515054243.

The spelling of 1663381144 in words is "one billion, six hundred sixty-three million, three hundred eighty-one thousand, one hundred forty-four".