63978379320 has 64 divisors (see below), whose sum is σ = 191953113120. Its totient is φ = 17059303424.

The previous prime is 63978379307. The next prime is 63978379331. The reversal of 63978379320 is 2397387936.

It is a happy number.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

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 15 ways as a sum of consecutive naturals, for example, 1839532 + ... + 1873988.

Almost surely, 2^63978379320 is an apocalyptic number.

63978379320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63978379320 is an abundant number, since it is smaller than the sum of its proper divisors (127974733800).

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

63978379320 is a wasteful number, since it uses less digits than its factorization.

63978379320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49944 (or 49940 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 57.

The spelling of 63978379320 in words is "sixty-three billion, nine hundred seventy-eight million, three hundred seventy-nine thousand, three hundred twenty".