161630135 has 8 divisors (see below), whose sum is σ = 205365456. Its totient is φ = 121697920.

The previous prime is 161630123. The next prime is 161630143. The reversal of 161630135 is 531036161.

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

It is not a de Polignac number, because 161630135 - 2⁶ = 161630071 is a prime.

It is a super-2 number, since 2×161630135² = 52248601080236450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950681 + ... + 950850.

It is an arithmetic number, because the mean of its divisors is an integer number (25670682).

Almost surely, 2^161630135 is an apocalyptic number.

161630135 is a deficient number, since it is larger than the sum of its proper divisors (43735321).

161630135 is a wasteful number, since it uses less digits than its factorization.

161630135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901553.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 161630135 is about 12713.3840892187. The cubic root of 161630135 is about 544.7209917731.

Adding to 161630135 its reverse (531036161), we get a palindrome (692666296).

The spelling of 161630135 in words is "one hundred sixty-one million, six hundred thirty thousand, one hundred thirty-five".