63960891712 has 28 divisors (see below), whose sum is σ = 127580048116. Its totient is φ = 31814737920.

The previous prime is 63960891697. The next prime is 63960891779. The reversal of 63960891712 is 21719806936.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43687688256 + 20273203456 = 209016^2 + 142384^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 63960891712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2576739 + ... + 2601442.

Almost surely, 2^63960891712 is an apocalyptic number.

It is an amenable number.

63960891712 is a deficient number, since it is larger than the sum of its proper divisors (63619156404).

63960891712 is a wasteful number, since it uses less digits than its factorization.

63960891712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5178386 (or 5178376 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 63960891712 in words is "sixty-three billion, nine hundred sixty million, eight hundred ninety-one thousand, seven hundred twelve".