65854314821 has 2 divisors, whose sum is σ = 65854314822. Its totient is φ = 65854314820.

The previous prime is 65854314809. The next prime is 65854314857. The reversal of 65854314821 is 12841345856.

65854314821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65440802596 + 413512225 = 255814^2 + 20335^2 .

It is a cyclic number.

It is not a de Polignac number, because 65854314821 - 2¹⁰ = 65854313797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65854314881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32927157410 + 32927157411.

It is an arithmetic number, because the mean of its divisors is an integer number (32927157411).

Almost surely, 2^65854314821 is an apocalyptic number.

It is an amenable number.

65854314821 is a deficient number, since it is larger than the sum of its proper divisors (1).

65854314821 is an equidigital number, since it uses as much as digits as its factorization.

65854314821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 921600, while the sum is 47.

The spelling of 65854314821 in words is "sixty-five billion, eight hundred fifty-four million, three hundred fourteen thousand, eight hundred twenty-one".