642234155200 has 168 divisors, whose sum is σ = 1724549621760. Its totient is φ = 233459942400.

The previous prime is 642234155191. The next prime is 642234155207. The reversal of 642234155200 is 2551432246.

It is not an unprimeable number, because it can be changed into a prime (642234155207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82768921 + ... + 82776679.

It is an arithmetic number, because the mean of its divisors is an integer number (10265176320).

Almost surely, 2^642234155200 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642234155200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (862274810880).

642234155200 is an abundant number, since it is smaller than the sum of its proper divisors (1082315466560).

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

642234155200 is a wasteful number, since it uses less digits than its factorization.

642234155200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12495 (or 12480 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 642234155200 its reverse (2551432246), we get a palindrome (644785587446).

The spelling of 642234155200 in words is "six hundred forty-two billion, two hundred thirty-four million, one hundred fifty-five thousand, two hundred".