61653445 has 8 divisors (see below), whose sum is σ = 84553344. Its totient is φ = 42276624.

The previous prime is 61653439. The next prime is 61653457. The reversal of 61653445 is 54435616.

61653445 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 a cyclic number.

It is not a de Polignac number, because 61653445 - 2⁹ = 61652933 is a prime.

It is a super-2 number, since 2×61653445² = 7602294560736050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61653445.

It is a congruent number.

It is an unprimeable number.

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, 880729 + ... + 880798.

It is an arithmetic number, because the mean of its divisors is an integer number (10569168).

Almost surely, 2^61653445 is an apocalyptic number.

It is an amenable number.

61653445 is a deficient number, since it is larger than the sum of its proper divisors (22899899).

61653445 is a wasteful number, since it uses less digits than its factorization.

61653445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761539.

The product of its digits is 43200, while the sum is 34.

The square root of 61653445 is about 7851.9707717235. The cubic root of 61653445 is about 395.0503487601.

The spelling of 61653445 in words is "sixty-one million, six hundred fifty-three thousand, four hundred forty-five".