61444878 has 32 divisors (see below), whose sum is σ = 134652672. Its totient is φ = 18537600.

The previous prime is 61444871. The next prime is 61444897. The reversal of 61444878 is 87844416.

It is a happy number.

61444878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61444871) 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 15 ways as a sum of consecutive naturals, for example, 13975 + ... + 17837.

It is an arithmetic number, because the mean of its divisors is an integer number (4207896).

Almost surely, 2^61444878 is an apocalyptic number.

61444878 is an abundant number, since it is smaller than the sum of its proper divisors (73207794).

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

61444878 is a wasteful number, since it uses less digits than its factorization.

61444878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4120.

The product of its digits is 172032, while the sum is 42.

The square root of 61444878 is about 7838.6783324742. The cubic root of 61444878 is about 394.6043744833.

The spelling of 61444878 in words is "sixty-one million, four hundred forty-four thousand, eight hundred seventy-eight".