65855314872 has 128 divisors (see below), whose sum is σ = 187537896000. Its totient is φ = 21399828480.

The previous prime is 65855314841. The next prime is 65855314879. The reversal of 65855314872 is 27841355856.

65855314872 is a `hidden beast` number, since 6 + 5 + 8 + 553 + 1 + 4 + 87 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65855314879) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 17471004 + ... + 17474772.

Almost surely, 2^65855314872 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 65855314872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93768948000).

65855314872 is an abundant number, since it is smaller than the sum of its proper divisors (121682581128).

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

65855314872 is a wasteful number, since it uses less digits than its factorization.

65855314872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5798 (or 5788 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 54.

The spelling of 65855314872 in words is "sixty-five billion, eight hundred fifty-five million, three hundred fourteen thousand, eight hundred seventy-two".