64855243119 has 4 divisors (see below), whose sum is σ = 86473657496. Its totient is φ = 43236828744.

The previous prime is 64855243111. The next prime is 64855243157. The reversal of 64855243119 is 91134255846.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64855243119 - 2³ = 64855243111 is a prime.

It is a super-2 number, since 2×64855243119² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64855243111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10809207184 + ... + 10809207189.

It is an arithmetic number, because the mean of its divisors is an integer number (21618414374).

Almost surely, 2^64855243119 is an apocalyptic number.

64855243119 is a deficient number, since it is larger than the sum of its proper divisors (21618414377).

64855243119 is a wasteful number, since it uses less digits than its factorization.

64855243119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21618414376.

The product of its digits is 1036800, while the sum is 48.

The spelling of 64855243119 in words is "sixty-four billion, eight hundred fifty-five million, two hundred forty-three thousand, one hundred nineteen".