63884643437 has 2 divisors, whose sum is σ = 63884643438. Its totient is φ = 63884643436.

The previous prime is 63884643421. The next prime is 63884643461. The reversal of 63884643437 is 73434648836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55674290116 + 8210353321 = 235954^2 + 90611^2 .

It is a cyclic number.

It is not a de Polignac number, because 63884643437 - 2⁴ = 63884643421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63884643037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31942321718 + 31942321719.

It is an arithmetic number, because the mean of its divisors is an integer number (31942321719).

Almost surely, 2^63884643437 is an apocalyptic number.

It is an amenable number.

63884643437 is a deficient number, since it is larger than the sum of its proper divisors (1).

63884643437 is an equidigital number, since it uses as much as digits as its factorization.

63884643437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27869184, while the sum is 56.

The spelling of 63884643437 in words is "sixty-three billion, eight hundred eighty-four million, six hundred forty-three thousand, four hundred thirty-seven".