320218386542 has 16 divisors (see below), whose sum is σ = 486461203200. Its totient is φ = 158065098360.

The previous prime is 320218386539. The next prime is 320218386547. The reversal of 320218386542 is 245683812023.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 320218386493 and 320218386502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320218386547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1392809 + ... + 1606347.

It is an arithmetic number, because the mean of its divisors is an integer number (30403825200).

Almost surely, 2^320218386542 is an apocalyptic number.

320218386542 is a deficient number, since it is larger than the sum of its proper divisors (166242816658).

320218386542 is a wasteful number, since it uses less digits than its factorization.

320218386542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223111.

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 320218386542 in words is "three hundred twenty billion, two hundred eighteen million, three hundred eighty-six thousand, five hundred forty-two".