65838581632 has 64 divisors (see below), whose sum is σ = 131725900800. Its totient is φ = 32778307584.

The previous prime is 65838581581. The next prime is 65838581681. The reversal of 65838581632 is 23618583856.

It is a tau number, because it is divible by the number of its divisors (64).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51475969 + ... + 51477247.

It is an arithmetic number, because the mean of its divisors is an integer number (2058217200).

Almost surely, 2^65838581632 is an apocalyptic number.

It is an amenable number.

65838581632 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

65838581632 is a wasteful number, since it uses less digits than its factorization.

65838581632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703 (or 2691 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 55.

The spelling of 65838581632 in words is "sixty-five billion, eight hundred thirty-eight million, five hundred eighty-one thousand, six hundred thirty-two".