63381957641 has 2 divisors, whose sum is σ = 63381957642. Its totient is φ = 63381957640.

The previous prime is 63381957637. The next prime is 63381957689. The reversal of 63381957641 is 14675918336.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59584810000 + 3797147641 = 244100^2 + 61621^2 .

It is a cyclic number.

It is not a de Polignac number, because 63381957641 - 2² = 63381957637 is a prime.

It is not a weakly prime, because it can be changed into another prime (63381857641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31690978820 + 31690978821.

It is an arithmetic number, because the mean of its divisors is an integer number (31690978821).

Almost surely, 2^63381957641 is an apocalyptic number.

It is an amenable number.

63381957641 is a deficient number, since it is larger than the sum of its proper divisors (1).

63381957641 is an equidigital number, since it uses as much as digits as its factorization.

63381957641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 53.

The spelling of 63381957641 in words is "sixty-three billion, three hundred eighty-one million, nine hundred fifty-seven thousand, six hundred forty-one".