64389518827 has 4 divisors (see below), whose sum is σ = 64775084976. Its totient is φ = 64003952680.

The previous prime is 64389518813. The next prime is 64389518833. The reversal of 64389518827 is 72881598346.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64389518827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64389518807) 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, 192782824 + ... + 192783157.

It is an arithmetic number, because the mean of its divisors is an integer number (16193771244).

Almost surely, 2^64389518827 is an apocalyptic number.

64389518827 is a deficient number, since it is larger than the sum of its proper divisors (385566149).

64389518827 is a wasteful number, since it uses less digits than its factorization.

64389518827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385566148.

The product of its digits is 23224320, while the sum is 61.

The spelling of 64389518827 in words is "sixty-four billion, three hundred eighty-nine million, five hundred eighteen thousand, eight hundred twenty-seven".