320657742242 has 8 divisors (see below), whose sum is σ = 493986251676. Its totient is φ = 155995658352.

The previous prime is 320657742211. The next prime is 320657742269. The reversal of 320657742242 is 242247756023.

It can be written as a sum of positive squares in 2 ways, for example, as 318842044921 + 1815697321 = 564661^2 + 42611^2 .

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

It is a super-2 number, since 2×320657742242² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320657742193 and 320657742202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2166606293 + ... + 2166606440.

Almost surely, 2^320657742242 is an apocalyptic number.

320657742242 is a deficient number, since it is larger than the sum of its proper divisors (173328509434).

320657742242 is a wasteful number, since it uses less digits than its factorization.

320657742242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4333212772.

The product of its (nonzero) digits is 1128960, while the sum is 44.

The spelling of 320657742242 in words is "three hundred twenty billion, six hundred fifty-seven million, seven hundred forty-two thousand, two hundred forty-two".