161553941 has 8 divisors (see below), whose sum is σ = 180060480. Its totient is φ = 144047808.

The previous prime is 161553929. The next prime is 161553943. The reversal of 161553941 is 149355161.

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 161553941 - 2¹⁴ = 161537557 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 (161553943) 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, 249761 + ... + 250406.

It is an arithmetic number, because the mean of its divisors is an integer number (22507560).

Almost surely, 2^161553941 is an apocalyptic number.

It is an amenable number.

161553941 is a deficient number, since it is larger than the sum of its proper divisors (18506539).

161553941 is a wasteful number, since it uses less digits than its factorization.

161553941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500203.

The product of its digits is 16200, while the sum is 35.

The square root of 161553941 is about 12710.3871302176. The cubic root of 161553941 is about 544.6353827480.

The spelling of 161553941 in words is "one hundred sixty-one million, five hundred fifty-three thousand, nine hundred forty-one".