642513442330 has 16 divisors (see below), whose sum is σ = 1156692835584. Its totient is φ = 256967901520.

The previous prime is 642513442303. The next prime is 642513442343. The reversal of 642513442330 is 33244315246.

It is a super-3 number, since 3×642513442330³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642513442330.

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, 4612366 + ... + 4749625.

It is an arithmetic number, because the mean of its divisors is an integer number (72293302224).

Almost surely, 2^642513442330 is an apocalyptic number.

642513442330 is a deficient number, since it is larger than the sum of its proper divisors (514179393254).

642513442330 is a wasteful number, since it uses less digits than its factorization.

642513442330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9368861.

The product of its (nonzero) digits is 207360, while the sum is 37.

Adding to 642513442330 its reverse (33244315246), we get a palindrome (675757757576).

The spelling of 642513442330 in words is "six hundred forty-two billion, five hundred thirteen million, four hundred forty-two thousand, three hundred thirty".