63995919036 has 72 divisors (see below), whose sum is σ = 174008330496. Its totient is φ = 18252430560.

The previous prime is 63995919019. The next prime is 63995919037. The reversal of 63995919036 is 63091959936.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63995919037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240445 + ... + 431051.

It is an arithmetic number, because the mean of its divisors is an integer number (2416782368).

Almost surely, 2^63995919036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63995919036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87004165248).

63995919036 is an abundant number, since it is smaller than the sum of its proper divisors (110012411460).

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

63995919036 is a wasteful number, since it uses less digits than its factorization.

63995919036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191199 (or 191190 counting only the distinct ones).

The product of its (nonzero) digits is 10628820, while the sum is 60.

The spelling of 63995919036 in words is "sixty-three billion, nine hundred ninety-five million, nine hundred nineteen thousand, thirty-six".