642441052530 has 48 divisors (see below), whose sum is σ = 1715491251864. Its totient is φ = 166687407360.

The previous prime is 642441052523. The next prime is 642441052531. The reversal of 642441052530 is 35250144246.

642441052530 is a `hidden beast` number, since 64 + 2 + 4 + 4 + 10 + 52 + 530 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 641807674641 + 633377889 = 801129^2 + 25167^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (642441052531) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 96459291 + ... + 96465950.

Almost surely, 2^642441052530 is an apocalyptic number.

642441052530 is an abundant number, since it is smaller than the sum of its proper divisors (1073050199334).

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

642441052530 is a wasteful number, since it uses less digits than its factorization.

642441052530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192925291 (or 192925288 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 642441052530 its reverse (35250144246), we get a palindrome (677691196776).

The spelling of 642441052530 in words is "six hundred forty-two billion, four hundred forty-one million, fifty-two thousand, five hundred thirty".