161226650 has 24 divisors (see below), whose sum is σ = 322950684. Its totient is φ = 59529600.

The previous prime is 161226641. The next prime is 161226671. The reversal of 161226650 is 56622161.

It can be written as a sum of positive squares in 6 ways, for example, as 74978281 + 86248369 = 8659^2 + 9287^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123371 + ... + 124670.

Almost surely, 2^161226650 is an apocalyptic number.

161226650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161226650 is an abundant number, since it is smaller than the sum of its proper divisors (161724034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161226650 is a wasteful number, since it uses less digits than its factorization.

161226650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248066 (or 248061 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 161226650 is about 12697.5056605618. The cubic root of 161226650 is about 544.2673430945.

The spelling of 161226650 in words is "one hundred sixty-one million, two hundred twenty-six thousand, six hundred fifty".