161547165 has 48 divisors (see below), whose sum is σ = 302964480. Its totient is φ = 79159680.

The previous prime is 161547149. The next prime is 161547167. The reversal of 161547165 is 561745161.

It is a happy number.

It is not a de Polignac number, because 161547165 - 2⁴ = 161547149 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161547167) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158026 + ... + 159044.

It is an arithmetic number, because the mean of its divisors is an integer number (6311760).

Almost surely, 2^161547165 is an apocalyptic number.

161547165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161547165 is a deficient number, since it is larger than the sum of its proper divisors (141417315).

161547165 is a wasteful number, since it uses less digits than its factorization.

161547165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314 (or 1311 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 161547165 is about 12710.1205737790. The cubic root of 161547165 is about 544.6277681583.

The spelling of 161547165 in words is "one hundred sixty-one million, five hundred forty-seven thousand, one hundred sixty-five".