161255834 has 8 divisors (see below), whose sum is σ = 250224660. Its totient is φ = 77847616.

The previous prime is 161255833. The next prime is 161255849. The reversal of 161255834 is 438552161.

It can be written as a sum of positive squares in 2 ways, for example, as 161213809 + 42025 = 12697^2 + 205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 161255794 and 161255803.

It is not an unprimeable number, because it can be changed into a prime (161255833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390079 + ... + 1390194.

Almost surely, 2^161255834 is an apocalyptic number.

161255834 is a deficient number, since it is larger than the sum of its proper divisors (88968826).

161255834 is a wasteful number, since it uses less digits than its factorization.

161255834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780304.

The product of its digits is 28800, while the sum is 35.

The square root of 161255834 is about 12698.6548106483. The cubic root of 161255834 is about 544.3001808002.

The spelling of 161255834 in words is "one hundred sixty-one million, two hundred fifty-five thousand, eight hundred thirty-four".