161255635 has 8 divisors (see below), whose sum is σ = 196679376. Its totient is φ = 126889440.

The previous prime is 161255621. The next prime is 161255651. The reversal of 161255635 is 536552161.

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

It is not a de Polignac number, because 161255635 - 2⁹ = 161255123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161255635.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 264049 + ... + 264658.

It is an arithmetic number, because the mean of its divisors is an integer number (24584922).

Almost surely, 2^161255635 is an apocalyptic number.

161255635 is a deficient number, since it is larger than the sum of its proper divisors (35423741).

161255635 is an equidigital number, since it uses as much as digits as its factorization.

161255635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528773.

The product of its digits is 27000, while the sum is 34.

The square root of 161255635 is about 12698.6469751702. The cubic root of 161255635 is about 544.2999568997.

The spelling of 161255635 in words is "one hundred sixty-one million, two hundred fifty-five thousand, six hundred thirty-five".