63802881972 has 18 divisors (see below), whose sum is σ = 161279507298. Its totient is φ = 21267627312.

The previous prime is 63802881971. The next prime is 63802882043. The reversal of 63802881972 is 27918820836.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46653408036 + 17149473936 = 215994^2 + 130956^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63802881971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 886151103 + ... + 886151174.

Almost surely, 2^63802881972 is an apocalyptic number.

It is an amenable number.

63802881972 is an abundant number, since it is smaller than the sum of its proper divisors (97476625326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63802881972 is a wasteful number, since it uses less digits than its factorization.

63802881972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772302287 (or 1772302282 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 63802881972 in words is "sixty-three billion, eight hundred two million, eight hundred eighty-one thousand, nine hundred seventy-two".