64855365121 has 8 divisors (see below), whose sum is σ = 64907728704. Its totient is φ = 64803027600.

The previous prime is 64855365119. The next prime is 64855365151. The reversal of 64855365121 is 12156355846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64855365121 - 2¹ = 64855365119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64855365151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9896796 + ... + 9903346.

It is an arithmetic number, because the mean of its divisors is an integer number (8113466088).

Almost surely, 2^64855365121 is an apocalyptic number.

It is an amenable number.

64855365121 is a deficient number, since it is larger than the sum of its proper divisors (52363583).

64855365121 is a wasteful number, since it uses less digits than its factorization.

64855365121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13031.

The product of its digits is 864000, while the sum is 46.

The spelling of 64855365121 in words is "sixty-four billion, eight hundred fifty-five million, three hundred sixty-five thousand, one hundred twenty-one".