61646 has 8 divisors (see below), whose sum is σ = 99624. Its totient is φ = 28440.

The previous prime is 61643. The next prime is 61651. The reversal of 61646 is 64616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1160 + ... + 1211.

It is an arithmetic number, because the mean of its divisors is an integer number (12453).

2⁶¹⁶⁴⁶ is an apocalyptic number.

61646 is a deficient number, since it is larger than the sum of its proper divisors (37978).

61646 is a wasteful number, since it uses less digits than its factorization.

61646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386.

The product of its digits is 864, while the sum is 23.

The square root of 61646 is about 248.2861252668. The cubic root of 61646 is about 39.5034446603.

It can be divided in two parts, 61 and 646, that added together give a palindrome (707).

The spelling of 61646 in words is "sixty-one thousand, six hundred forty-six".