61455612 has 48 divisors (see below), whose sum is σ = 154006272. Its totient is φ = 19004160.

The previous prime is 61455577. The next prime is 61455613. The reversal of 61455612 is 21655416.

It is a self number, because there is not a number n which added to its sum of digits gives 61455612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61455613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12363 + ... + 16605.

It is an arithmetic number, because the mean of its divisors is an integer number (3208464).

Almost surely, 2^61455612 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 61455612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77003136).

61455612 is an abundant number, since it is smaller than the sum of its proper divisors (92550660).

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

61455612 is a wasteful number, since it uses less digits than its factorization.

61455612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4338 (or 4336 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 61455612 is about 7839.3629843247. The cubic root of 61455612 is about 394.6273513739.

The spelling of 61455612 in words is "sixty-one million, four hundred fifty-five thousand, six hundred twelve".