161406650 has 24 divisors (see below), whose sum is σ = 304335804. Its totient is φ = 63676800.

The previous prime is 161406647. The next prime is 161406667. The reversal of 161406650 is 56604161.

It can be written as a sum of positive squares in 6 ways, for example, as 116877721 + 44528929 = 10811^2 + 6673^2 .

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, 18461 + ... + 25760.

Almost surely, 2^161406650 is an apocalyptic number.

161406650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161406650 is a deficient number, since it is larger than the sum of its proper divisors (142929154).

161406650 is a wasteful number, since it uses less digits than its factorization.

161406650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44306 (or 44301 counting only the distinct ones).

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

The square root of 161406650 is about 12704.5916896215. The cubic root of 161406650 is about 544.4698151751.

The spelling of 161406650 in words is "one hundred sixty-one million, four hundred six thousand, six hundred fifty".