161103876673 has 4 divisors (see below), whose sum is σ = 165458035540. Its totient is φ = 156749717808.

The previous prime is 161103876617. The next prime is 161103876709. The reversal of 161103876673 is 376678301161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 376678301161 = 887 ⋅424665503.

It can be written as a sum of positive squares in 2 ways, for example, as 152011872769 + 9092003904 = 389887^2 + 95352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161103876673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161103876173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2177079378 + ... + 2177079451.

It is an arithmetic number, because the mean of its divisors is an integer number (41364508885).

Almost surely, 2^161103876673 is an apocalyptic number.

It is an amenable number.

161103876673 is a deficient number, since it is larger than the sum of its proper divisors (4354158867).

161103876673 is an equidigital number, since it uses as much as digits as its factorization.

161103876673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4354158866.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 161103876673 in words is "one hundred sixty-one billion, one hundred three million, eight hundred seventy-six thousand, six hundred seventy-three".