161071647 has 8 divisors (see below), whose sum is σ = 234286080. Its totient is φ = 97619160.

The previous prime is 161071639. The next prime is 161071661. The reversal of 161071647 is 746170161.

161071647 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 161071647 - 2³ = 161071639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 4880959 = 161071647 / (1 + 6 + 1 + 0 + 7 + 1 + 6 + 4 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161071697) 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, 2440447 + ... + 2440512.

It is an arithmetic number, because the mean of its divisors is an integer number (29285760).

Almost surely, 2^161071647 is an apocalyptic number.

161071647 is a deficient number, since it is larger than the sum of its proper divisors (73214433).

161071647 is a wasteful number, since it uses less digits than its factorization.

161071647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4880973.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 161071647 is about 12691.4005137337. The cubic root of 161071647 is about 544.0928679670.

The spelling of 161071647 in words is "one hundred sixty-one million, seventy-one thousand, six hundred forty-seven".