63970869978 has 24 divisors (see below), whose sum is σ = 138856961568. Its totient is φ = 21284637192.

The previous prime is 63970869931. The next prime is 63970870003. The reversal of 63970869978 is 87996807936.

63970869978 is a `hidden beast` number, since 6 + 397 + 0 + 86 + 99 + 78 = 666.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3238726 + ... + 3258417.

It is an arithmetic number, because the mean of its divisors is an integer number (5785706732).

Almost surely, 2^63970869978 is an apocalyptic number.

63970869978 is an abundant number, since it is smaller than the sum of its proper divisors (74886091590).

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

63970869978 is a wasteful number, since it uses less digits than its factorization.

63970869978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6497698 (or 6497695 counting only the distinct ones).

The product of its (nonzero) digits is 246903552, while the sum is 72.

The spelling of 63970869978 in words is "sixty-three billion, nine hundred seventy million, eight hundred sixty-nine thousand, nine hundred seventy-eight".