65388534120 has 768 divisors, whose sum is σ = 289164556800. Its totient is φ = 12982394880.

The previous prime is 65388534119. The next prime is 65388534149. The reversal of 65388534120 is 2143588356.

65388534120 is a `hidden beast` number, since 6 + 538 + 8 + 53 + 41 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 11692525 + ... + 11698115.

It is an arithmetic number, because the mean of its divisors is an integer number (376516350).

Almost surely, 2^65388534120 is an apocalyptic number.

65388534120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65388534120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144582278400).

65388534120 is an abundant number, since it is smaller than the sum of its proper divisors (223776022680).

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

65388534120 is a wasteful number, since it uses less digits than its factorization.

65388534120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5655 (or 5638 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 65388534120 in words is "sixty-five billion, three hundred eighty-eight million, five hundred thirty-four thousand, one hundred twenty".