63335384561 has 2 divisors, whose sum is σ = 63335384562. Its totient is φ = 63335384560.

The previous prime is 63335384473. The next prime is 63335384633. The reversal of 63335384561 is 16548353336.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54955080625 + 8380303936 = 234425^2 + 91544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63335384561 is a prime.

It is a super-2 number, since 2×63335384561² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63335386561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31667692280 + 31667692281.

It is an arithmetic number, because the mean of its divisors is an integer number (31667692281).

Almost surely, 2^63335384561 is an apocalyptic number.

It is an amenable number.

63335384561 is a deficient number, since it is larger than the sum of its proper divisors (1).

63335384561 is an equidigital number, since it uses as much as digits as its factorization.

63335384561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 47.

The spelling of 63335384561 in words is "sixty-three billion, three hundred thirty-five million, three hundred eighty-four thousand, five hundred sixty-one".