161436513 has 16 divisors (see below), whose sum is σ = 252648320. Its totient is φ = 89755776.

The previous prime is 161436511. The next prime is 161436529. The reversal of 161436513 is 315634161.

It is not a de Polignac number, because 161436513 - 2¹ = 161436511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161436511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103108 + ... + 104661.

It is an arithmetic number, because the mean of its divisors is an integer number (15790520).

Almost surely, 2^161436513 is an apocalyptic number.

It is an amenable number.

161436513 is a deficient number, since it is larger than the sum of its proper divisors (91211807).

161436513 is a wasteful number, since it uses less digits than its factorization.

161436513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207816.

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

The square root of 161436513 is about 12705.7669190018. The cubic root of 161436513 is about 544.5033918574.

The spelling of 161436513 in words is "one hundred sixty-one million, four hundred thirty-six thousand, five hundred thirteen".