1663381143 has 16 divisors (see below), whose sum is σ = 2470003200. Its totient is φ = 1106340120.

The previous prime is 1663381127. The next prime is 1663381147. The reversal of 1663381143 is 3411833661.

1663381143 is a `hidden beast` number, since 1 + 6 + 633 + 8 + 1 + 14 + 3 = 666.

It is not a de Polignac number, because 1663381143 - 2⁴ = 1663381127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1663381098 and 1663381107.

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 15 ways as a sum of consecutive naturals, for example, 59833 + ... + 83106.

It is an arithmetic number, because the mean of its divisors is an integer number (154375200).

Almost surely, 2^1663381143 is an apocalyptic number.

1663381143 is a deficient number, since it is larger than the sum of its proper divisors (806622057).

1663381143 is a wasteful number, since it uses less digits than its factorization.

1663381143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143379 (or 143373 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 1663381143 is about 40784.5699131424. The cubic root of 1663381143 is about 1184.8515051868.

The spelling of 1663381143 in words is "one billion, six hundred sixty-three million, three hundred eighty-one thousand, one hundred forty-three".