161362171703 has 4 divisors (see below), whose sum is σ = 161366183160. Its totient is φ = 161358160248.

The previous prime is 161362171699. The next prime is 161362171709. The reversal of 161362171703 is 307171263161.

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 161362171703 - 2² = 161362171699 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161362171709) 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, 1944773 + ... + 2026046.

It is an arithmetic number, because the mean of its divisors is an integer number (40341545790).

Almost surely, 2^161362171703 is an apocalyptic number.

161362171703 is a deficient number, since it is larger than the sum of its proper divisors (4011457).

161362171703 is an equidigital number, since it uses as much as digits as its factorization.

161362171703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4011456.

The product of its (nonzero) digits is 31752, while the sum is 38.

The spelling of 161362171703 in words is "one hundred sixty-one billion, three hundred sixty-two million, one hundred seventy-one thousand, seven hundred three".