63652121437621 has 2 divisors, whose sum is σ = 63652121437622. Its totient is φ = 63652121437620.

The previous prime is 63652121437507. The next prime is 63652121437661. The reversal of 63652121437621 is 12673412125636.

63652121437621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57714560940100 + 5937560497521 = 7597010^2 + 2436711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63652121437621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63652121437661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31826060718810 + 31826060718811.

It is an arithmetic number, because the mean of its divisors is an integer number (31826060718811).

Almost surely, 2^{63652121437621} is an apocalyptic number.

It is an amenable number.

63652121437621 is a deficient number, since it is larger than the sum of its proper divisors (1).

63652121437621 is an equidigital number, since it uses as much as digits as its factorization.

63652121437621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 49.

The spelling of 63652121437621 in words is "sixty-three trillion, six hundred fifty-two billion, one hundred twenty-one million, four hundred thirty-seven thousand, six hundred twenty-one".