161135643 has 8 divisors (see below), whose sum is σ = 215581968. Its totient is φ = 107056544.

The previous prime is 161135641. The next prime is 161135647. The reversal of 161135643 is 346531161.

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 161135643 - 2¹ = 161135641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161135643.

It is not an unprimeable number, because it can be changed into a prime (161135641) 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, 90780 + ... + 92537.

It is an arithmetic number, because the mean of its divisors is an integer number (26947746).

Almost surely, 2^161135643 is an apocalyptic number.

161135643 is a deficient number, since it is larger than the sum of its proper divisors (54446325).

161135643 is a wasteful number, since it uses less digits than its factorization.

161135643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183613.

The product of its digits is 6480, while the sum is 30.

The square root of 161135643 is about 12693.9214981029. The cubic root of 161135643 is about 544.1649169742.

The spelling of 161135643 in words is "one hundred sixty-one million, one hundred thirty-five thousand, six hundred forty-three".