642172203322 has 16 divisors (see below), whose sum is σ = 1037376275040. Its totient is φ = 296381120112.

The previous prime is 642172203319. The next prime is 642172203353. The reversal of 642172203322 is 223302271246.

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 7 ways as a sum of consecutive naturals, for example, 1204833 + ... + 1654075.

It is an arithmetic number, because the mean of its divisors is an integer number (64836017190).

Almost surely, 2^642172203322 is an apocalyptic number.

642172203322 is a deficient number, since it is larger than the sum of its proper divisors (395204071718).

642172203322 is a wasteful number, since it uses less digits than its factorization.

642172203322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504237.

The product of its (nonzero) digits is 48384, while the sum is 34.

Adding to 642172203322 its reverse (223302271246), we get a palindrome (865474474568).

The spelling of 642172203322 in words is "six hundred forty-two billion, one hundred seventy-two million, two hundred three thousand, three hundred twenty-two".