61356 has 12 divisors (see below), whose sum is σ = 143192. Its totient is φ = 20448.

The previous prime is 61343. The next prime is 61357. The reversal of 61356 is 65316.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (61357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2545 + ... + 2568.

2⁶¹³⁵⁶ is an apocalyptic number.

It is an amenable number.

61356 is an abundant number, since it is smaller than the sum of its proper divisors (81836).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71596).

61356 is a wasteful number, since it uses less digits than its factorization.

61356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5120 (or 5118 counting only the distinct ones).

The product of its digits is 540, while the sum is 21.

The square root of 61356 is about 247.7014331812. The cubic root of 61356 is about 39.4414021914.

The spelling of 61356 in words is "sixty-one thousand, three hundred fifty-six".