161884909453 has 8 divisors (see below), whose sum is σ = 169032264480. Its totient is φ = 154841895600.

The previous prime is 161884909447. The next prime is 161884909457. The reversal of 161884909453 is 354909488161.

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 161884909453 - 2⁵ = 161884909421 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 (161884909457) 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, 26082123 + ... + 26088328.

It is an arithmetic number, because the mean of its divisors is an integer number (21129033060).

Almost surely, 2^161884909453 is an apocalyptic number.

It is an amenable number.

161884909453 is a deficient number, since it is larger than the sum of its proper divisors (7147355027).

161884909453 is a wasteful number, since it uses less digits than its factorization.

161884909453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52170587.

The product of its (nonzero) digits is 7464960, while the sum is 58.

The spelling of 161884909453 in words is "one hundred sixty-one billion, eight hundred eighty-four million, nine hundred nine thousand, four hundred fifty-three".