161645341630 has 32 divisors (see below), whose sum is σ = 292115105280. Its totient is φ = 64401972480.

The previous prime is 161645341609. The next prime is 161645341633. The reversal of 161645341630 is 36143546161.

161645341630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161645341630² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161645341633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9384466 + ... + 9401674.

It is an arithmetic number, because the mean of its divisors is an integer number (9128597040).

Almost surely, 2^161645341630 is an apocalyptic number.

161645341630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161645341630 is a deficient number, since it is larger than the sum of its proper divisors (130469763650).

161645341630 is a wasteful number, since it uses less digits than its factorization.

161645341630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20884.

The product of its (nonzero) digits is 155520, while the sum is 40.

Adding to 161645341630 its reverse (36143546161), we get a palindrome (197788887791).

The spelling of 161645341630 in words is "one hundred sixty-one billion, six hundred forty-five million, three hundred forty-one thousand, six hundred thirty".