161318053143 has 28 divisors (see below), whose sum is σ = 260471562120. Its totient is φ = 99272642256.

The previous prime is 161318053121. The next prime is 161318053159. The reversal of 161318053143 is 341350813161.

161318053143 is a `hidden beast` number, since 1 + 6 + 1 + 3 + 1 + 80 + 531 + 43 = 666.

161318053143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161318053143 - 2⁸ = 161318052887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161318053098 and 161318053107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161318053243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 8501553 + ... + 8520506.

It is an arithmetic number, because the mean of its divisors is an integer number (9302555790).

Almost surely, 2^161318053143 is an apocalyptic number.

161318053143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161318053143 is a deficient number, since it is larger than the sum of its proper divisors (99153508977).

161318053143 is an equidigital number, since it uses as much as digits as its factorization.

161318053143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17022090 (or 17022075 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 161318053143 in words is "one hundred sixty-one billion, three hundred eighteen million, fifty-three thousand, one hundred forty-three".