61443653 has 8 divisors (see below), whose sum is σ = 63075576. Its totient is φ = 59832000.

The previous prime is 61443631. The next prime is 61443667. The reversal of 61443653 is 35634416.

61443653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1737124 + 59706529 = 1318^2 + 7727^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 61443653 - 2¹⁰ = 61442629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61442653) 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, 1175 + ... + 11147.

It is an arithmetic number, because the mean of its divisors is an integer number (7884447).

Almost surely, 2^61443653 is an apocalyptic number.

It is an amenable number.

61443653 is a deficient number, since it is larger than the sum of its proper divisors (1631923).

61443653 is a wasteful number, since it uses less digits than its factorization.

61443653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10135.

The product of its digits is 25920, while the sum is 32.

The square root of 61443653 is about 7838.6001939122. The cubic root of 61443653 is about 394.6017521135.

The spelling of 61443653 in words is "sixty-one million, four hundred forty-three thousand, six hundred fifty-three".