161832643 has 24 divisors (see below), whose sum is σ = 192707424. Its totient is φ = 135475200.

The previous prime is 161832641. The next prime is 161832719. The reversal of 161832643 is 346238161.

It is a happy number.

It is not a de Polignac number, because 161832643 - 2¹ = 161832641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161832599 and 161832608.

It is not an unprimeable number, because it can be changed into a prime (161832641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 629571 + ... + 629827.

It is an arithmetic number, because the mean of its divisors is an integer number (8029476).

Almost surely, 2^161832643 is an apocalyptic number.

161832643 is a deficient number, since it is larger than the sum of its proper divisors (30874781).

161832643 is a wasteful number, since it uses less digits than its factorization.

161832643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 516 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 161832643 is about 12721.3459586633. The cubic root of 161832643 is about 544.9483922740.

The spelling of 161832643 in words is "one hundred sixty-one million, eight hundred thirty-two thousand, six hundred forty-three".