61563583 has 4 divisors (see below), whose sum is σ = 61599568. Its totient is φ = 61527600.

The previous prime is 61563577. The next prime is 61563587. The reversal of 61563583 is 38536516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61563583 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 (61563587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15291 + ... + 18892.

It is an arithmetic number, because the mean of its divisors is an integer number (15399892).

Almost surely, 2^61563583 is an apocalyptic number.

61563583 is a deficient number, since it is larger than the sum of its proper divisors (35985).

61563583 is a wasteful number, since it uses less digits than its factorization.

61563583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35984.

The product of its digits is 64800, while the sum is 37.

The square root of 61563583 is about 7846.2464274327. The cubic root of 61563583 is about 394.8583223134.

The spelling of 61563583 in words is "sixty-one million, five hundred sixty-three thousand, five hundred eighty-three".