64315585671 has 4 divisors (see below), whose sum is σ = 85754114232. Its totient is φ = 42877057112.

The previous prime is 64315585669. The next prime is 64315585679. The reversal of 64315585671 is 17658551346.

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

It is a cyclic number.

It is not a de Polignac number, because 64315585671 - 2¹ = 64315585669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64315585679) 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, 10719264276 + ... + 10719264281.

It is an arithmetic number, because the mean of its divisors is an integer number (21438528558).

Almost surely, 2^64315585671 is an apocalyptic number.

64315585671 is a deficient number, since it is larger than the sum of its proper divisors (21438528561).

64315585671 is a wasteful number, since it uses less digits than its factorization.

64315585671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21438528560.

The product of its digits is 3024000, while the sum is 51.

The spelling of 64315585671 in words is "sixty-four billion, three hundred fifteen million, five hundred eighty-five thousand, six hundred seventy-one".