320657742243 has 12 divisors (see below), whose sum is σ = 464123373168. Its totient is φ = 213332868720.

The previous prime is 320657742211. The next prime is 320657742269. The reversal of 320657742243 is 342247756023.

320657742243 is a `hidden beast` number, since 32 + 0 + 6 + 577 + 4 + 2 + 2 + 43 = 666.

It is not a de Polignac number, because 320657742243 - 2⁵ = 320657742211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320657732243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36575328 + ... + 36584093.

It is an arithmetic number, because the mean of its divisors is an integer number (38676947764).

Almost surely, 2^320657742243 is an apocalyptic number.

320657742243 is a deficient number, since it is larger than the sum of its proper divisors (143465630925).

320657742243 is a wasteful number, since it uses less digits than its factorization.

320657742243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73159914 (or 73159911 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 45.

The spelling of 320657742243 in words is "three hundred twenty billion, six hundred fifty-seven million, seven hundred forty-two thousand, two hundred forty-three".