320468705557 has 64 divisors (see below), whose sum is σ = 437751982080. Its totient is φ = 226511251200.

The previous prime is 320468705507. The next prime is 320468705567. The reversal of 320468705557 is 755507864023.

It is a happy number.

It is not a de Polignac number, because 320468705557 - 2¹¹ = 320468703509 is a prime.

It is a super-4 number, since 4×320468705557⁴ (a number of 47 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320468705507) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 90551694 + ... + 90555232.

It is an arithmetic number, because the mean of its divisors is an integer number (6839874720).

Almost surely, 2^320468705557 is an apocalyptic number.

It is an amenable number.

320468705557 is a deficient number, since it is larger than the sum of its proper divisors (117283276523).

320468705557 is a wasteful number, since it uses less digits than its factorization.

320468705557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5114.

The product of its (nonzero) digits is 7056000, while the sum is 52.

The spelling of 320468705557 in words is "three hundred twenty billion, four hundred sixty-eight million, seven hundred five thousand, five hundred fifty-seven".