161071850 has 12 divisors (see below), whose sum is σ = 299593734. Its totient is φ = 64428720.

The previous prime is 161071837. The next prime is 161071853. The reversal of 161071850 is 58170161.

161071850 is digitally balanced in base 2, 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 3 ways, for example, as 79512889 + 81558961 = 8917^2 + 9031^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (161071853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1610669 + ... + 1610768.

Almost surely, 2^161071850 is an apocalyptic number.

161071850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161071850 is a deficient number, since it is larger than the sum of its proper divisors (138521884).

161071850 is a wasteful number, since it uses less digits than its factorization.

161071850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221449 (or 3221444 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 161071850 is about 12691.4085112725. The cubic root of 161071850 is about 544.0930965419.

The spelling of 161071850 in words is "one hundred sixty-one million, seventy-one thousand, eight hundred fifty".