320564204605535 has 8 divisors (see below), whose sum is σ = 419647686029136. Its totient is φ = 233137603349440.

The previous prime is 320564204605457. The next prime is 320564204605573. The reversal of 320564204605535 is 535506402465023.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-320564204605535 is a prime.

It is a super-2 number, since 2×320564204605535² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2914220041814 + ... + 2914220041923.

It is an arithmetic number, because the mean of its divisors is an integer number (52455960753642).

Almost surely, 2^{320564204605535} is an apocalyptic number.

320564204605535 is a deficient number, since it is larger than the sum of its proper divisors (99083481423601).

320564204605535 is a wasteful number, since it uses less digits than its factorization.

320564204605535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5828440083753.

The product of its (nonzero) digits is 12960000, while the sum is 50.

The spelling of 320564204605535 in words is "three hundred twenty trillion, five hundred sixty-four billion, two hundred four million, six hundred five thousand, five hundred thirty-five".