61424444563 has 4 divisors (see below), whose sum is σ = 61437044160. Its totient is φ = 61411844968.

The previous prime is 61424444509. The next prime is 61424444617. The reversal of 61424444563 is 36544442416.

61424444563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (61424444509) and next prime (61424444617).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61424444563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61424441563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6292483 + ... + 6302236.

It is an arithmetic number, because the mean of its divisors is an integer number (15359261040).

Almost surely, 2^61424444563 is an apocalyptic number.

61424444563 is a deficient number, since it is larger than the sum of its proper divisors (12599597).

61424444563 is a wasteful number, since it uses less digits than its factorization.

61424444563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12599596.

The product of its digits is 1105920, while the sum is 43.

Adding to 61424444563 its reverse (36544442416), we get a palindrome (97968886979).

The spelling of 61424444563 in words is "sixty-one billion, four hundred twenty-four million, four hundred forty-four thousand, five hundred sixty-three".