320145332660 has 12 divisors (see below), whose sum is σ = 672305198628. Its totient is φ = 128058133056.

The previous prime is 320145332653. The next prime is 320145332671. The reversal of 320145332660 is 66233541023.

It can be written as a sum of positive squares in 2 ways, for example, as 33472897936 + 286672434724 = 182956^2 + 535418^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 320145332660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8003633297 + ... + 8003633336.

It is an arithmetic number, because the mean of its divisors is an integer number (56025433219).

Almost surely, 2^320145332660 is an apocalyptic number.

It is an amenable number.

320145332660 is an abundant number, since it is smaller than the sum of its proper divisors (352159865968).

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

320145332660 is a wasteful number, since it uses less digits than its factorization.

320145332660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16007266642 (or 16007266640 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 320145332660 its reverse (66233541023), we get a palindrome (386378873683).

The spelling of 320145332660 in words is "three hundred twenty billion, one hundred forty-five million, three hundred thirty-two thousand, six hundred sixty".