63144304561 has 4 divisors (see below), whose sum is σ = 68001558772. Its totient is φ = 58287050352.

The previous prime is 63144304507. The next prime is 63144304589. The reversal of 63144304561 is 16540344136.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7504930161 + 55639374400 = 86631^2 + 235880^2 .

It is a cyclic number.

It is not a de Polignac number, because 63144304561 - 2¹⁷ = 63144173489 is a prime.

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 63144304561.

It is not an unprimeable number, because it can be changed into a prime (63144304961) 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, 2428627086 + ... + 2428627111.

It is an arithmetic number, because the mean of its divisors is an integer number (17000389693).

Almost surely, 2^63144304561 is an apocalyptic number.

It is an amenable number.

63144304561 is a deficient number, since it is larger than the sum of its proper divisors (4857254211).

63144304561 is a wasteful number, since it uses less digits than its factorization.

63144304561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4857254210.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 63144304561 its reverse (16540344136), we get a palindrome (79684648697).

The spelling of 63144304561 in words is "sixty-three billion, one hundred forty-four million, three hundred four thousand, five hundred sixty-one".