642035333242 has 4 divisors (see below), whose sum is σ = 963052999866. Its totient is φ = 321017666620.

The previous prime is 642035333221. The next prime is 642035333257. The reversal of 642035333242 is 242333530246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242333530246 = 2 ⋅121166765123.

It can be written as a sum of positive squares in only one way, i.e., 595874381041 + 46160952201 = 771929^2 + 214851^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160508833309 + ... + 160508833312.

Almost surely, 2^642035333242 is an apocalyptic number.

642035333242 is a deficient number, since it is larger than the sum of its proper divisors (321017666624).

642035333242 is a wasteful number, since it uses less digits than its factorization.

642035333242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321017666623.

The product of its (nonzero) digits is 311040, while the sum is 37.

Adding to 642035333242 its reverse (242333530246), we get a palindrome (884368863488).

The spelling of 642035333242 in words is "six hundred forty-two billion, thirty-five million, three hundred thirty-three thousand, two hundred forty-two".