161432649 has 16 divisors (see below), whose sum is σ = 273325440. Its totient is φ = 92247120.

The previous prime is 161432617. The next prime is 161432651. The reversal of 161432649 is 946234161.

161432649 is a `hidden beast` number, since 1 + 6 + 1 + 4 + 3 + 2 + 649 = 666.

It is not a de Polignac number, because 161432649 - 2⁵ = 161432617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161432669) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 426882 + ... + 427259.

It is an arithmetic number, because the mean of its divisors is an integer number (17082840).

Almost surely, 2^161432649 is an apocalyptic number.

It is an amenable number.

161432649 is a deficient number, since it is larger than the sum of its proper divisors (111892791).

161432649 is an equidigital number, since it uses as much as digits as its factorization.

161432649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854157 (or 854151 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 161432649 is about 12705.6148611549. The cubic root of 161432649 is about 544.4990475740.

The spelling of 161432649 in words is "one hundred sixty-one million, four hundred thirty-two thousand, six hundred forty-nine".