61624556 has 54 divisors (see below), whose sum is σ = 129347820. Its totient is φ = 25607232.

The previous prime is 61624513. The next prime is 61624561. The reversal of 61624556 is 65542616.

61624556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 844136 + ... + 844208.

It is an arithmetic number, because the mean of its divisors is an integer number (2395330).

Almost surely, 2^61624556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61624556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64673910).

61624556 is an abundant number, since it is smaller than the sum of its proper divisors (67723264).

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

61624556 is a wasteful number, since it uses less digits than its factorization.

61624556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 141 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 61624556 is about 7850.1309543217. The cubic root of 61624556 is about 394.9886361095.

The spelling of 61624556 in words is "sixty-one million, six hundred twenty-four thousand, five hundred fifty-six".