161630635 has 8 divisors (see below), whose sum is σ = 194113440. Its totient is φ = 129200064.

The previous prime is 161630629. The next prime is 161630671. The reversal of 161630635 is 536036161.

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

It is a cyclic number.

It is not a de Polignac number, because 161630635 - 2³ = 161630627 is a prime.

It is a super-2 number, since 2×161630635² = 52248924341006450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161630597 and 161630606.

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, 5890 + ... + 18919.

It is an arithmetic number, because the mean of its divisors is an integer number (24264180).

Almost surely, 2^161630635 is an apocalyptic number.

161630635 is a deficient number, since it is larger than the sum of its proper divisors (32482805).

161630635 is a wasteful number, since it uses less digits than its factorization.

161630635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26117.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 161630635 is about 12713.4037535194. The cubic root of 161630635 is about 544.7215534674.

Adding to 161630635 its reverse (536036161), we get a palindrome (697666796).

The spelling of 161630635 in words is "one hundred sixty-one million, six hundred thirty thousand, six hundred thirty-five".