63955891960 has 32 divisors (see below), whose sum is σ = 144109069200. Its totient is φ = 25545323520.

The previous prime is 63955891927. The next prime is 63955891969. The reversal of 63955891960 is 6919855936.

It is a super-2 number, since 2×63955891960² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63955891969) 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 7 ways as a sum of consecutive naturals, for example, 1129305 + ... + 1184584.

Almost surely, 2^63955891960 is an apocalyptic number.

It is an amenable number.

63955891960 is an abundant number, since it is smaller than the sum of its proper divisors (80153177240).

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

63955891960 is a wasteful number, since it uses less digits than its factorization.

63955891960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314591 (or 2314587 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 61.

The spelling of 63955891960 in words is "sixty-three billion, nine hundred fifty-five million, eight hundred ninety-one thousand, nine hundred sixty".