563611631021 has 4 divisors (see below), whose sum is σ = 563736688032. Its totient is φ = 563486574012.

The previous prime is 563611630973. The next prime is 563611631039. The reversal of 563611631021 is 120136116365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 563611631021 - 2⁶ = 563611630957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563611631071) 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, 62521745 + ... + 62530758.

It is an arithmetic number, because the mean of its divisors is an integer number (140934172008).

Almost surely, 2^563611631021 is an apocalyptic number.

It is an amenable number.

563611631021 is a deficient number, since it is larger than the sum of its proper divisors (125057011).

563611631021 is a wasteful number, since it uses less digits than its factorization.

563611631021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125057010.

The product of its (nonzero) digits is 19440, while the sum is 35.

Adding to 563611631021 its reverse (120136116365), we get a palindrome (683747747386).

The spelling of 563611631021 in words is "five hundred sixty-three billion, six hundred eleven million, six hundred thirty-one thousand, twenty-one".