63209886881 has 4 divisors (see below), whose sum is σ = 63232488852. Its totient is φ = 63187284912.

The previous prime is 63209886847. The next prime is 63209886893. The reversal of 63209886881 is 18868890236.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21223827856 + 41986059025 = 145684^2 + 204905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63209886881 is a prime.

It is a super-2 number, since 2×63209886881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63209886881.

It is not an unprimeable number, because it can be changed into a prime (63209886811) 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 in 3 ways as a sum of consecutive naturals, for example, 11296790 + ... + 11302383.

It is an arithmetic number, because the mean of its divisors is an integer number (15808122213).

Almost surely, 2^63209886881 is an apocalyptic number.

It is an amenable number.

63209886881 is a deficient number, since it is larger than the sum of its proper divisors (22601971).

63209886881 is a wasteful number, since it uses less digits than its factorization.

63209886881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22601970.

The product of its (nonzero) digits is 7962624, while the sum is 59.

The spelling of 63209886881 in words is "sixty-three billion, two hundred nine million, eight hundred eighty-six thousand, eight hundred eighty-one".