161610 has 16 divisors (see below), whose sum is σ = 387936. Its totient is φ = 43088.

The previous prime is 161599. The next prime is 161611. The reversal of 161610 is 16161.

It is a super-2 number, since 2×161610² = 52235584200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 161610.

It is not an unprimeable number, because it can be changed into a prime (161611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2664 + ... + 2723.

It is an arithmetic number, because the mean of its divisors is an integer number (24246).

2¹⁶¹⁶¹⁰ is an apocalyptic number.

161610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161610 is an abundant number, since it is smaller than the sum of its proper divisors (226326).

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

161610 is a wasteful number, since it uses less digits than its factorization.

161610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 161610 is about 402.0074626173. The cubic root of 161610 is about 54.4698371378.

Adding to 161610 its reverse (16161), we get a palindrome (177771).

The spelling of 161610 in words is "one hundred sixty-one thousand, six hundred ten".