161494650 has 36 divisors (see below), whose sum is σ = 433883502. Its totient is φ = 43065120.

The previous prime is 161494643. The next prime is 161494673. The reversal of 161494650 is 56494161.

161494650 is a `hidden beast` number, since 161 + 494 + 6 + 5 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 138368169 + 23126481 = 11763^2 + 4809^2 .

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 178989 + ... + 179888.

Almost surely, 2^161494650 is an apocalyptic number.

161494650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161494650 is an abundant number, since it is smaller than the sum of its proper divisors (272388852).

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

161494650 is a wasteful number, since it uses less digits than its factorization.

161494650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358895 (or 358887 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 161494650 is about 12708.0545324609. The cubic root of 161494650 is about 544.5687467429.

The spelling of 161494650 in words is "one hundred sixty-one million, four hundred ninety-four thousand, six hundred fifty".