163944248831 has 16 divisors (see below), whose sum is σ = 189466242048. Its totient is φ = 140200944000.

The previous prime is 163944248803. The next prime is 163944248833. The reversal of 163944248831 is 138842449361.

It is a cyclic number.

It is not a de Polignac number, because 163944248831 - 2¹⁰ = 163944247807 is a prime.

It is a super-2 number, since 2×163944248831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163944248833) 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, 140156 + ... + 589518.

It is an arithmetic number, because the mean of its divisors is an integer number (11841640128).

Almost surely, 2^163944248831 is an apocalyptic number.

163944248831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

163944248831 is a deficient number, since it is larger than the sum of its proper divisors (25521993217).

163944248831 is a wasteful number, since it uses less digits than its factorization.

163944248831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451342.

The product of its digits is 3981312, while the sum is 53.

The spelling of 163944248831 in words is "one hundred sixty-three billion, nine hundred forty-four million, two hundred forty-eight thousand, eight hundred thirty-one".