161443630 has 8 divisors (see below), whose sum is σ = 290598552. Its totient is φ = 64577448.

The previous prime is 161443621. The next prime is 161443631. The reversal of 161443630 is 36344161.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161443631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8072172 + ... + 8072191.

It is an arithmetic number, because the mean of its divisors is an integer number (36324819).

Almost surely, 2^161443630 is an apocalyptic number.

161443630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161443630 is a deficient number, since it is larger than the sum of its proper divisors (129154922).

161443630 is a wasteful number, since it uses less digits than its factorization.

161443630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16144370.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 161443630 is about 12706.0469855892. The cubic root of 161443630 is about 544.5113932974.

Adding to 161443630 its reverse (36344161), we get a palindrome (197787791).

The spelling of 161443630 in words is "one hundred sixty-one million, four hundred forty-three thousand, six hundred thirty".