161143351553 has 8 divisors (see below), whose sum is σ = 161503258560. Its totient is φ = 160783615440.

The previous prime is 161143351547. The next prime is 161143351591. The reversal of 161143351553 is 355153341161.

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 161143351553 - 2⁸ = 161143351297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161143351153) 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, 1948148 + ... + 2029178.

It is an arithmetic number, because the mean of its divisors is an integer number (20187907320).

Almost surely, 2^161143351553 is an apocalyptic number.

It is an amenable number.

161143351553 is a deficient number, since it is larger than the sum of its proper divisors (359907007).

161143351553 is an equidigital number, since it uses as much as digits as its factorization.

161143351553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85447.

The product of its digits is 81000, while the sum is 38.

The spelling of 161143351553 in words is "one hundred sixty-one billion, one hundred forty-three million, three hundred fifty-one thousand, five hundred fifty-three".