61440459 has 8 divisors (see below), whose sum is σ = 81990720. Its totient is φ = 40925256.

The previous prime is 61440439. The next prime is 61440487. The reversal of 61440459 is 95404416.

61440459 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61440459 - 2⁷ = 61440331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61440439) 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, 4357 + ... + 11910.

It is an arithmetic number, because the mean of its divisors is an integer number (10248840).

Almost surely, 2^61440459 is an apocalyptic number.

61440459 is a deficient number, since it is larger than the sum of its proper divisors (20550261).

61440459 is a wasteful number, since it uses less digits than its factorization.

61440459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17529.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 61440459 is about 7838.3964559086. The cubic root of 61440459 is about 394.5949145218.

The spelling of 61440459 in words is "sixty-one million, four hundred forty thousand, four hundred fifty-nine".