61307144 has 32 divisors (see below), whose sum is σ = 121763520. Its totient is φ = 28877376.

The previous prime is 61307143. The next prime is 61307161. The reversal of 61307144 is 44170316.

61307144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61307143) by changing a digit.

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, 9842 + ... + 14814.

It is an arithmetic number, because the mean of its divisors is an integer number (3805110).

Almost surely, 2^61307144 is an apocalyptic number.

It is an amenable number.

61307144 is a deficient number, since it is larger than the sum of its proper divisors (60456376).

61307144 is a wasteful number, since it uses less digits than its factorization.

61307144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5069 (or 5065 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 61307144 is about 7829.8878663746. The cubic root of 61307144 is about 394.3093073069.

The spelling of 61307144 in words is "sixty-one million, three hundred seven thousand, one hundred forty-four".