63135530881 has 2 divisors, whose sum is σ = 63135530882. Its totient is φ = 63135530880.

The previous prime is 63135530873. The next prime is 63135530897. The reversal of 63135530881 is 18803553136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49499130256 + 13636400625 = 222484^2 + 116775^2 .

It is a cyclic number.

It is not a de Polignac number, because 63135530881 - 2³ = 63135530873 is a prime.

It is a super-2 number, since 2×63135530881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63135530581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31567765440 + 31567765441.

It is an arithmetic number, because the mean of its divisors is an integer number (31567765441).

Almost surely, 2^63135530881 is an apocalyptic number.

It is an amenable number.

63135530881 is a deficient number, since it is larger than the sum of its proper divisors (1).

63135530881 is an equidigital number, since it uses as much as digits as its factorization.

63135530881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 63135530881 in words is "sixty-three billion, one hundred thirty-five million, five hundred thirty thousand, eight hundred eighty-one".