161554654434223 has 8 divisors (see below), whose sum is σ = 171070043724720. Its totient is φ = 152040617846400.

The previous prime is 161554654434197. The next prime is 161554654434247. The reversal of 161554654434223 is 322434456455161.

It is a happy number.

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 161554654434223 - 2⁵ = 161554654434191 is a prime.

It is a super-2 number, since 2×161554654434223² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161554654434263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337929768 + ... + 338407501.

It is an arithmetic number, because the mean of its divisors is an integer number (21383755465590).

Almost surely, 2^{161554654434223} is an apocalyptic number.

161554654434223 is a deficient number, since it is larger than the sum of its proper divisors (9515389290497).

161554654434223 is a wasteful number, since it uses less digits than its factorization.

161554654434223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676351337.

The product of its digits is 41472000, while the sum is 55.

The spelling of 161554654434223 in words is "one hundred sixty-one trillion, five hundred fifty-four billion, six hundred fifty-four million, four hundred thirty-four thousand, two hundred twenty-three".