63967639040 has 40 divisors (see below), whose sum is σ = 153372415680. Its totient is φ = 25587054592.

The previous prime is 63967638961. The next prime is 63967639063. The reversal of 63967639040 is 4093676936.

It is a tau number, because it is divible by the number of its divisors (40).

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, 12491120 + ... + 12496239.

It is an arithmetic number, because the mean of its divisors is an integer number (3834310392).

Almost surely, 2^63967639040 is an apocalyptic number.

It is an amenable number.

63967639040 is an abundant number, since it is smaller than the sum of its proper divisors (89404776640).

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

63967639040 is an equidigital number, since it uses as much as digits as its factorization.

63967639040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24987382 (or 24987366 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 53.

The spelling of 63967639040 in words is "sixty-three billion, nine hundred sixty-seven million, six hundred thirty-nine thousand, forty".