161036647 has 4 divisors (see below), whose sum is σ = 169512280. Its totient is φ = 152561016.

The previous prime is 161036611. The next prime is 161036653. The reversal of 161036647 is 746630161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746630161 = 7933 ⋅94117.

It is a cyclic number.

It is not a de Polignac number, because 161036647 - 2¹⁵ = 161003879 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 (161036657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4237788 + ... + 4237825.

It is an arithmetic number, because the mean of its divisors is an integer number (42378070).

Almost surely, 2^161036647 is an apocalyptic number.

161036647 is a deficient number, since it is larger than the sum of its proper divisors (8475633).

161036647 is an equidigital number, since it uses as much as digits as its factorization.

161036647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8475632.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 161036647 is about 12690.0215523852. The cubic root of 161036647 is about 544.0534556305.

The spelling of 161036647 in words is "one hundred sixty-one million, thirty-six thousand, six hundred forty-seven".