161078650 has 12 divisors (see below), whose sum is σ = 299606382. Its totient is φ = 64431440.

The previous prime is 161078639. The next prime is 161078651. The reversal of 161078650 is 56870161.

It can be written as a sum of positive squares in 3 ways, for example, as 155475961 + 5602689 = 12469^2 + 2367^2 .

It is not an unprimeable number, because it can be changed into a prime (161078651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1610737 + ... + 1610836.

Almost surely, 2^161078650 is an apocalyptic number.

161078650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161078650 is a deficient number, since it is larger than the sum of its proper divisors (138527732).

161078650 is a wasteful number, since it uses less digits than its factorization.

161078650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221585 (or 3221580 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 161078650 is about 12691.6764062121. The cubic root of 161078650 is about 544.1007531271.

The spelling of 161078650 in words is "one hundred sixty-one million, seventy-eight thousand, six hundred fifty".