61554 has 8 divisors (see below), whose sum is σ = 123120. Its totient is φ = 20516.

The previous prime is 61553. The next prime is 61559. The reversal of 61554 is 45516.

It is a happy number.

61554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

61554 is an admirable number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 61554.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 61554.

It is not an unprimeable number, because it can be changed into a prime (61553) 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, 5124 + ... + 5135.

It is an arithmetic number, because the mean of its divisors is an integer number (15390).

2⁶¹⁵⁵⁴ is an apocalyptic number.

61554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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 (61560).

61554 is a wasteful number, since it uses less digits than its factorization.

61554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10264.

The product of its digits is 600, while the sum is 21.

The square root of 61554 is about 248.1007859722. The cubic root of 61554 is about 39.4837833341.

The spelling of 61554 in words is "sixty-one thousand, five hundred fifty-four".