161663037410103 has 4 divisors (see below), whose sum is σ = 215550716546808. Its totient is φ = 107775358273400.

The previous prime is 161663037410059. The next prime is 161663037410159. The reversal of 161663037410103 is 301014730366161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161663037410103 - 2⁹ = 161663037409591 is a prime.

It is a super-2 number, since 2×161663037410103² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161663037410603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26943839568348 + ... + 26943839568353.

It is an arithmetic number, because the mean of its divisors is an integer number (53887679136702).

Almost surely, 2^{161663037410103} is an apocalyptic number.

161663037410103 is a deficient number, since it is larger than the sum of its proper divisors (53887679136705).

161663037410103 is an equidigital number, since it uses as much as digits as its factorization.

161663037410103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53887679136704.

The product of its (nonzero) digits is 163296, while the sum is 42.

Adding to 161663037410103 its reverse (301014730366161), we get a palindrome (462677767776264).

The spelling of 161663037410103 in words is "one hundred sixty-one trillion, six hundred sixty-three billion, thirty-seven million, four hundred ten thousand, one hundred three".