61616 has 10 divisors (see below), whose sum is σ = 119412. Its totient is φ = 30800.

The previous prime is 61613. The next prime is 61627.

61616 is nontrivially palindromic in base 10.

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

61616 is an undulating number in base 10.

It is not an unprimeable number, because it can be changed into a prime (61613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1910 + ... + 1941.

2⁶¹⁶¹⁶ is an apocalyptic number.

It is an amenable number.

61616 is a deficient number, since it is larger than the sum of its proper divisors (57796).

61616 is a wasteful number, since it uses less digits than its factorization.

61616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3859 (or 3853 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 61616 is about 248.2257037456. The cubic root of 61616 is about 39.4970355090.

The spelling of 61616 in words is "sixty-one thousand, six hundred sixteen".