61133644 has 24 divisors (see below), whose sum is σ = 125688528. Its totient is φ = 25650240.

The previous prime is 61133603. The next prime is 61133669. The reversal of 61133644 is 44633116.

61133644 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 7 ways as a sum of consecutive naturals, for example, 52867 + ... + 54010.

It is an arithmetic number, because the mean of its divisors is an integer number (5237022).

Almost surely, 2^61133644 is an apocalyptic number.

It is an amenable number.

61133644 is an abundant number, since it is smaller than the sum of its proper divisors (64554884).

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

61133644 is a wasteful number, since it uses less digits than its factorization.

61133644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106905 (or 106903 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 61133644 is about 7818.8006752954. The cubic root of 61133644 is about 393.9369890731.

The spelling of 61133644 in words is "sixty-one million, one hundred thirty-three thousand, six hundred forty-four".