63224402981 has 2 divisors, whose sum is σ = 63224402982. Its totient is φ = 63224402980.

The previous prime is 63224402963. The next prime is 63224403007. The reversal of 63224402981 is 18920442236.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34806872356 + 28417530625 = 186566^2 + 168575^2 .

It is a cyclic number.

It is not a de Polignac number, because 63224402981 - 2²⁶ = 63157294117 is a prime.

It is a super-2 number, since 2×63224402981² (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 (63224402911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31612201490 + 31612201491.

It is an arithmetic number, because the mean of its divisors is an integer number (31612201491).

Almost surely, 2^63224402981 is an apocalyptic number.

It is an amenable number.

63224402981 is a deficient number, since it is larger than the sum of its proper divisors (1).

63224402981 is an equidigital number, since it uses as much as digits as its factorization.

63224402981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 63224402981 in words is "sixty-three billion, two hundred twenty-four million, four hundred two thousand, nine hundred eighty-one".