642321525550 has 192 divisors, whose sum is σ = 1343356876800. Its totient is φ = 227232051200.

The previous prime is 642321525493. The next prime is 642321525581. The reversal of 642321525550 is 55525123246.

642321525550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 498309306 + ... + 498310594.

It is an arithmetic number, because the mean of its divisors is an integer number (6996650400).

Almost surely, 2^642321525550 is an apocalyptic number.

642321525550 is an abundant number, since it is smaller than the sum of its proper divisors (701035351250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642321525550 is a wasteful number, since it uses less digits than its factorization.

642321525550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771 (or 1766 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 40.

Adding to 642321525550 its reverse (55525123246), we get a palindrome (697846648796).

The spelling of 642321525550 in words is "six hundred forty-two billion, three hundred twenty-one million, five hundred twenty-five thousand, five hundred fifty".