61321144 has 8 divisors (see below), whose sum is σ = 114977160. Its totient is φ = 30660568.

The previous prime is 61321129. The next prime is 61321163. The reversal of 61321144 is 44112316.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3832564 + ... + 3832579.

It is an arithmetic number, because the mean of its divisors is an integer number (14372145).

Almost surely, 2^61321144 is an apocalyptic number.

It is an amenable number.

61321144 is a deficient number, since it is larger than the sum of its proper divisors (53656016).

61321144 is a wasteful number, since it uses less digits than its factorization.

61321144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7665149 (or 7665145 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 61321144 is about 7830.7818255906. The cubic root of 61321144 is about 394.3393196338.

The spelling of 61321144 in words is "sixty-one million, three hundred twenty-one thousand, one hundred forty-four".