65855504838321 has 12 divisors (see below), whose sum is σ = 103772310654480. Its totient is φ = 39912427174680.

The previous prime is 65855504838271. The next prime is 65855504838377. The reversal of 65855504838321 is 12383840555856.

It is a happy number.

65855504838321 is a `hidden beast` number, since 6 + 5 + 8 + 5 + 5 + 50 + 483 + 83 + 21 = 666.

It is not a de Polignac number, because 65855504838321 - 2¹¹ = 65855504836273 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (65855504834321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332603559691 + ... + 332603559888.

It is an arithmetic number, because the mean of its divisors is an integer number (8647692554540).

Almost surely, 2^{65855504838321} is an apocalyptic number.

It is an amenable number.

65855504838321 is a deficient number, since it is larger than the sum of its proper divisors (37916805816159).

65855504838321 is a wasteful number, since it uses less digits than its factorization.

65855504838321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665207119596 (or 665207119593 counting only the distinct ones).

The product of its (nonzero) digits is 138240000, while the sum is 63.

The spelling of 65855504838321 in words is "sixty-five trillion, eight hundred fifty-five billion, five hundred four million, eight hundred thirty-eight thousand, three hundred twenty-one".