53647565 has 8 divisors (see below), whose sum is σ = 64416408. Its totient is φ = 42891840.

The previous prime is 53647549. The next prime is 53647567. The reversal of 53647565 is 56574635.

53647565 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 8462281 + 45185284 = 2909^2 + 6722^2 .

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

It is not a de Polignac number, because 53647565 - 2⁴ = 53647549 is a prime.

It is a super-2 number, since 2×53647565² = 5756122460858450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53647567) 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, 14219 + ... + 17591.

It is an arithmetic number, because the mean of its divisors is an integer number (8052051).

Almost surely, 2^53647565 is an apocalyptic number.

It is an amenable number.

53647565 is a deficient number, since it is larger than the sum of its proper divisors (10768843).

53647565 is a wasteful number, since it uses less digits than its factorization.

53647565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6559.

The product of its digits is 378000, while the sum is 41.

The square root of 53647565 is about 7324.4498086887. The cubic root of 53647565 is about 377.1522227207.

The spelling of 53647565 in words is "fifty-three million, six hundred forty-seven thousand, five hundred sixty-five".