161286786 has 24 divisors (see below), whose sum is σ = 370011564. Its totient is φ = 50599680.

The previous prime is 161286767. The next prime is 161286793. The reversal of 161286786 is 687682161.

It is a happy number.

161286786 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 160503561 + 783225 = 12669^2 + 885^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263235 + ... + 263846.

Almost surely, 2^161286786 is an apocalyptic number.

161286786 is an abundant number, since it is smaller than the sum of its proper divisors (208724778).

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

161286786 is a wasteful number, since it uses less digits than its factorization.

161286786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527106 (or 527103 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 161286786 is about 12699.8734639366. The cubic root of 161286786 is about 544.3350035226.

The spelling of 161286786 in words is "one hundred sixty-one million, two hundred eighty-six thousand, seven hundred eighty-six".