161531653103 has 8 divisors (see below), whose sum is σ = 162165842400. Its totient is φ = 160898462208.

The previous prime is 161531653093. The next prime is 161531653117. The reversal of 161531653103 is 301356135161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161531653103 - 2¹⁴ = 161531636719 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 (161531653163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75443 + ... + 573371.

It is an arithmetic number, because the mean of its divisors is an integer number (20270730300).

Almost surely, 2^161531653103 is an apocalyptic number.

161531653103 is a deficient number, since it is larger than the sum of its proper divisors (634189297).

161531653103 is an equidigital number, since it uses as much as digits as its factorization.

161531653103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499201.

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

Adding to 161531653103 its reverse (301356135161), we get a palindrome (462887788264).

The spelling of 161531653103 in words is "one hundred sixty-one billion, five hundred thirty-one million, six hundred fifty-three thousand, one hundred three".