161605010 has 32 divisors (see below), whose sum is σ = 334160640. Its totient is φ = 55121472.

The previous prime is 161605001. The next prime is 161605019. The reversal of 161605010 is 10506161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161605001) and next prime (161605019).

It is a super-2 number, since 2×161605010² = 52232358514200200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161605019) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7931 + ... + 19649.

It is an arithmetic number, because the mean of its divisors is an integer number (10442520).

Almost surely, 2^161605010 is an apocalyptic number.

161605010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161605010 is an abundant number, since it is smaller than the sum of its proper divisors (172555630).

161605010 is a wasteful number, since it uses less digits than its factorization.

161605010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11930.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 161605010 is about 12712.3959189446. The cubic root of 161605010 is about 544.6927651388.

The spelling of 161605010 in words is "one hundred sixty-one million, six hundred five thousand, ten".