63640065640044 has 12 divisors (see below), whose sum is σ = 148493486493464. Its totient is φ = 21213355213344.

The previous prime is 63640065640003. The next prime is 63640065640091. The reversal of 63640065640044 is 44004656004636.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 63640065639975 and 63640065640002.

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, 2651669401657 + ... + 2651669401680.

Almost surely, 2^{63640065640044} is an apocalyptic number.

It is an amenable number.

63640065640044 is an abundant number, since it is smaller than the sum of its proper divisors (84853420853420).

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

63640065640044 is a wasteful number, since it uses less digits than its factorization.

63640065640044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303338803344 (or 5303338803342 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 48.

The spelling of 63640065640044 in words is "sixty-three trillion, six hundred forty billion, sixty-five million, six hundred forty thousand, forty-four".