64854847517 has 8 divisors (see below), whose sum is σ = 68128819200. Its totient is φ = 61618725520.

The previous prime is 64854847511. The next prime is 64854847553. The reversal of 64854847517 is 71574845846.

64854847517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 64854847517 - 2²² = 64850653213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64854847511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9458909 + ... + 9465762.

It is an arithmetic number, because the mean of its divisors is an integer number (8516102400).

Almost surely, 2^64854847517 is an apocalyptic number.

It is an amenable number.

64854847517 is a deficient number, since it is larger than the sum of its proper divisors (3273971683).

64854847517 is a wasteful number, since it uses less digits than its factorization.

64854847517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18924843.

The product of its digits is 30105600, while the sum is 59.

The spelling of 64854847517 in words is "sixty-four billion, eight hundred fifty-four million, eight hundred forty-seven thousand, five hundred seventeen".