1163142643 has 8 divisors (see below), whose sum is σ = 1295809200. Its totient is φ = 1036646688.

The previous prime is 1163142623. The next prime is 1163142649. The reversal of 1163142643 is 3462413611.

It is a happy number.

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 1163142643 - 2¹⁷ = 1163011571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163142649) 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, 1542253 + ... + 1543006.

It is an arithmetic number, because the mean of its divisors is an integer number (161976150).

Almost surely, 2^1163142643 is an apocalyptic number.

1163142643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1163142643 is a deficient number, since it is larger than the sum of its proper divisors (132666557).

1163142643 is a wasteful number, since it uses less digits than its factorization.

1163142643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085301.

The product of its digits is 10368, while the sum is 31.

The square root of 1163142643 is about 34104.8771145712. The cubic root of 1163142643 is about 1051.6655781723.

The spelling of 1163142643 in words is "one billion, one hundred sixty-three million, one hundred forty-two thousand, six hundred forty-three".