65138833888 has 48 divisors (see below), whose sum is σ = 133940565360. Its totient is φ = 31152024576.

The previous prime is 65138833873. The next prime is 65138833909. The reversal of 65138833888 is 88833883156.

It is a happy number.

It is a super-3 number, since 3×65138833888³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396381 + ... + 536092.

It is an arithmetic number, because the mean of its divisors is an integer number (2790428445).

Almost surely, 2^65138833888 is an apocalyptic number.

It is an amenable number.

65138833888 is an abundant number, since it is smaller than the sum of its proper divisors (68801731472).

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

65138833888 is a wasteful number, since it uses less digits than its factorization.

65138833888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932579 (or 932571 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 61.

The spelling of 65138833888 in words is "sixty-five billion, one hundred thirty-eight million, eight hundred thirty-three thousand, eight hundred eighty-eight".