65381029056 has 336 divisors, whose sum is σ = 218077816320. Its totient is φ = 18342973440.

The previous prime is 65381029037. The next prime is 65381029061. The reversal of 65381029056 is 65092018356.

65381029056 is a `hidden beast` number, since 6 + 538 + 102 + 9 + 0 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a super-2 number, since 2×65381029056² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59927071 + ... + 59928161.

It is an arithmetic number, because the mean of its divisors is an integer number (649041120).

Almost surely, 2^65381029056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65381029056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109038908160).

65381029056 is an abundant number, since it is smaller than the sum of its proper divisors (152696787264).

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

65381029056 is a wasteful number, since it uses less digits than its factorization.

65381029056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 65381029056 in words is "sixty-five billion, three hundred eighty-one million, twenty-nine thousand, fifty-six".