161507834 has 4 divisors (see below), whose sum is σ = 242261754. Its totient is φ = 80753916.

The previous prime is 161507821. The next prime is 161507851. The reversal of 161507834 is 438705161.

161507834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 104550625 + 56957209 = 10225^2 + 7547^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161507794 and 161507803.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40376957 + ... + 40376960.

Almost surely, 2^161507834 is an apocalyptic number.

161507834 is a deficient number, since it is larger than the sum of its proper divisors (80753920).

161507834 is an equidigital number, since it uses as much as digits as its factorization.

161507834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80753919.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 161507834 is about 12708.5732480086. The cubic root of 161507834 is about 544.5835653948.

The spelling of 161507834 in words is "one hundred sixty-one million, five hundred seven thousand, eight hundred thirty-four".