64595989088569 has 3 divisors (see below), whose sum is σ = 64595997125733. Its totient is φ = 64595981051406.

The previous prime is 64595989088567. The next prime is 64595989088671. The reversal of 64595989088569 is 96588098959546.

The square root of 64595989088569 is 8037163.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 64595989088569 - 2¹ = 64595989088567 is a prime.

It is a super-2 number, since 2×64595989088569² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64595989088567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4018582 + ... + 12055744.

It is an arithmetic number, because the mean of its divisors is an integer number (21531999041911).

Almost surely, 2^{64595989088569} is an apocalyptic number.

64595989088569 is the 8037163-rd square number.

64595989088569 is the 4018582-nd centered octagonal number.

It is an amenable number.

64595989088569 is a deficient number, since it is larger than the sum of its proper divisors (8037164).

64595989088569 is an frugal number, since it uses more digits than its factorization.

64595989088569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16074326 (or 8037163 counting only the distinct ones).

The product of its (nonzero) digits is 60466176000, while the sum is 91.

The spelling of 64595989088569 in words is "sixty-four trillion, five hundred ninety-five billion, nine hundred eighty-nine million, eighty-eight thousand, five hundred sixty-nine".