63488121710521 has 2 divisors, whose sum is σ = 63488121710522. Its totient is φ = 63488121710520.

The previous prime is 63488121710473. The next prime is 63488121710617. The reversal of 63488121710521 is 12501712188436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62335367325625 + 1152754384896 = 7895275^2 + 1073664^2 .

It is a cyclic number.

It is not a de Polignac number, because 63488121710521 - 2²⁵ = 63488088156089 is a prime.

It is not a weakly prime, because it can be changed into another prime (63488121510521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31744060855260 + 31744060855261.

It is an arithmetic number, because the mean of its divisors is an integer number (31744060855261).

Almost surely, 2^{63488121710521} is an apocalyptic number.

It is an amenable number.

63488121710521 is a deficient number, since it is larger than the sum of its proper divisors (1).

63488121710521 is an equidigital number, since it uses as much as digits as its factorization.

63488121710521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 49.

Adding to 63488121710521 its reverse (12501712188436), we get a palindrome (75989833898957).

The spelling of 63488121710521 in words is "sixty-three trillion, four hundred eighty-eight billion, one hundred twenty-one million, seven hundred ten thousand, five hundred twenty-one".