161432650 has 24 divisors (see below), whose sum is σ = 303646860. Its totient is φ = 63845760.

The previous prime is 161432617. The next prime is 161432651. The reversal of 161432650 is 56234161.

It can be written as a sum of positive squares in 6 ways, for example, as 59644729 + 101787921 = 7723^2 + 10089^2 .

It is not an unprimeable number, because it can be changed into a prime (161432651) 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 11 ways as a sum of consecutive naturals, for example, 13689 + ... + 22588.

Almost surely, 2^161432650 is an apocalyptic number.

161432650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161432650 is a deficient number, since it is larger than the sum of its proper divisors (142214210).

161432650 is a wasteful number, since it uses less digits than its factorization.

161432650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36378 (or 36373 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 161432650 is about 12705.6149005076. The cubic root of 161432650 is about 544.4990486983.

The spelling of 161432650 in words is "one hundred sixty-one million, four hundred thirty-two thousand, six hundred fifty".