65634384538 has 8 divisors (see below), whose sum is σ = 99020661588. Its totient is φ = 32627497344.

The previous prime is 65634384503. The next prime is 65634384551. The reversal of 65634384538 is 83548343656.

65634384538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 55822095289 + 9812289249 = 236267^2 + 99057^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 94847031 + ... + 94847722.

Almost surely, 2^65634384538 is an apocalyptic number.

65634384538 is a deficient number, since it is larger than the sum of its proper divisors (33386277050).

65634384538 is a wasteful number, since it uses less digits than its factorization.

65634384538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189694928.

The product of its digits is 24883200, while the sum is 55.

The spelling of 65634384538 in words is "sixty-five billion, six hundred thirty-four million, three hundred eighty-four thousand, five hundred thirty-eight".