161541545 has 8 divisors (see below), whose sum is σ = 211472640. Its totient is φ = 117484720.

The previous prime is 161541511. The next prime is 161541547. The reversal of 161541545 is 545145161.

161541545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161541545 - 2¹⁸ = 161279401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161541547) 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, 1468505 + ... + 1468614.

It is an arithmetic number, because the mean of its divisors is an integer number (26434080).

Almost surely, 2^161541545 is an apocalyptic number.

It is an amenable number.

161541545 is a deficient number, since it is larger than the sum of its proper divisors (49931095).

161541545 is a wasteful number, since it uses less digits than its factorization.

161541545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937135.

The product of its digits is 12000, while the sum is 32.

The square root of 161541545 is about 12709.8994881942. The cubic root of 161541545 is about 544.6214524722.

The spelling of 161541545 in words is "one hundred sixty-one million, five hundred forty-one thousand, five hundred forty-five".