63971706942 has 96 divisors (see below), whose sum is σ = 164026568160. Its totient is φ = 17763471360.

The previous prime is 63971706907. The next prime is 63971706983. The reversal of 63971706942 is 24960717936.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 261934 + ... + 443342.

It is an arithmetic number, because the mean of its divisors is an integer number (1708610085).

Almost surely, 2^63971706942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63971706942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82013284080).

63971706942 is an abundant number, since it is smaller than the sum of its proper divisors (100054861218).

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

63971706942 is a wasteful number, since it uses less digits than its factorization.

63971706942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181578 (or 181575 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 63971706942 in words is "sixty-three billion, nine hundred seventy-one million, seven hundred six thousand, nine hundred forty-two".