63333905381 has 2 divisors, whose sum is σ = 63333905382. Its totient is φ = 63333905380.

The previous prime is 63333905363. The next prime is 63333905413. The reversal of 63333905381 is 18350933336.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50801102881 + 12532802500 = 225391^2 + 111950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63333905381 is a prime.

It is a super-2 number, since 2×63333905381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63333905321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31666952690 + 31666952691.

It is an arithmetic number, because the mean of its divisors is an integer number (31666952691).

Almost surely, 2^63333905381 is an apocalyptic number.

It is an amenable number.

63333905381 is a deficient number, since it is larger than the sum of its proper divisors (1).

63333905381 is an equidigital number, since it uses as much as digits as its factorization.

63333905381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 44.

The spelling of 63333905381 in words is "sixty-three billion, three hundred thirty-three million, nine hundred five thousand, three hundred eighty-one".