320656549454639 has 8 divisors (see below), whose sum is σ = 321140192342112. Its totient is φ = 320172981256800.

The previous prime is 320656549454627. The next prime is 320656549454641. The reversal of 320656549454639 is 936454945656023.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320656549454639 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 (320656549154639) 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, 10076579 + ... + 27255284.

It is an arithmetic number, because the mean of its divisors is an integer number (40142524042764).

Almost surely, 2^{320656549454639} is an apocalyptic number.

320656549454639 is a deficient number, since it is larger than the sum of its proper divisors (483642887473).

320656549454639 is a wasteful number, since it uses less digits than its factorization.

320656549454639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37344817.

The product of its (nonzero) digits is 2519424000, while the sum is 71.

The spelling of 320656549454639 in words is "three hundred twenty trillion, six hundred fifty-six billion, five hundred forty-nine million, four hundred fifty-four thousand, six hundred thirty-nine".