320665261130656 has 48 divisors (see below), whose sum is σ = 696454264420488. Its totient is φ = 144389611008000.

The previous prime is 320665261130653. The next prime is 320665261130707. The reversal of 320665261130656 is 656031162566023.

It can be written as a sum of positive squares in 4 ways, for example, as 100870285296400 + 219794975834256 = 10043420^2 + 14825484^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (320665261130653) by changing a digit.

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, 9400348245 + ... + 9400382356.

Almost surely, 2^{320665261130656} is an apocalyptic number.

It is an amenable number.

320665261130656 is an abundant number, since it is smaller than the sum of its proper divisors (375789003289832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320665261130656 is a wasteful number, since it uses less digits than its factorization.

320665261130656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18800730665 (or 18800730657 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 52.

The spelling of 320665261130656 in words is "three hundred twenty trillion, six hundred sixty-five billion, two hundred sixty-one million, one hundred thirty thousand, six hundred fifty-six".