65908398836 has 18 divisors (see below), whose sum is σ = 134170669458. Its totient is φ = 28246456560.

The previous prime is 65908398817. The next prime is 65908398839. The reversal of 65908398836 is 63889380956.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 63708788836 + 2199610000 = 252406^2 + 46900^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65908398839) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168133475 + ... + 168133866.

It is an arithmetic number, because the mean of its divisors is an integer number (7453926081).

Almost surely, 2^65908398836 is an apocalyptic number.

It is an amenable number.

65908398836 is an abundant number, since it is smaller than the sum of its proper divisors (68262270622).

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

65908398836 is a wasteful number, since it uses less digits than its factorization.

65908398836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336267359 (or 336267350 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 65.

The spelling of 65908398836 in words is "sixty-five billion, nine hundred eight million, three hundred ninety-eight thousand, eight hundred thirty-six".