161353651103 has 4 divisors (see below), whose sum is σ = 161356876128. Its totient is φ = 161350426080.

The previous prime is 161353651099. The next prime is 161353651133. The reversal of 161353651103 is 301156353161.

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 161353651103 - 2² = 161353651099 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 (161353651133) 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, 1536263 + ... + 1637928.

It is an arithmetic number, because the mean of its divisors is an integer number (40339219032).

Almost surely, 2^161353651103 is an apocalyptic number.

161353651103 is a deficient number, since it is larger than the sum of its proper divisors (3225025).

161353651103 is an equidigital number, since it uses as much as digits as its factorization.

161353651103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225024.

The product of its (nonzero) digits is 24300, while the sum is 35.

The spelling of 161353651103 in words is "one hundred sixty-one billion, three hundred fifty-three million, six hundred fifty-one thousand, one hundred three".