63921187053 has 12 divisors (see below), whose sum is σ = 92367910908. Its totient is φ = 42596905920.

The previous prime is 63921187007. The next prime is 63921187061. The reversal of 63921187053 is 35078112936.

63921187053 is a `hidden beast` number, since 639 + 2 + 1 + 1 + 8 + 7 + 0 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28391576004 + 35529611049 = 168498^2 + 188493^2 .

It is not a de Polignac number, because 63921187053 - 2¹⁰ = 63921186029 is a prime.

It is a super-2 number, since 2×63921187053² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63921187003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1411368 + ... + 1455953.

It is an arithmetic number, because the mean of its divisors is an integer number (7697325909).

Almost surely, 2^63921187053 is an apocalyptic number.

It is an amenable number.

63921187053 is a deficient number, since it is larger than the sum of its proper divisors (28446723855).

63921187053 is a wasteful number, since it uses less digits than its factorization.

63921187053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869804 (or 2869801 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

Adding to 63921187053 its reverse (35078112936), we get a palindrome (98999299989).

The spelling of 63921187053 in words is "sixty-three billion, nine hundred twenty-one million, one hundred eighty-seven thousand, fifty-three".