634240645242 has 32 divisors (see below), whose sum is σ = 1290298490880. Its totient is φ = 207801350640.

The previous prime is 634240645237. The next prime is 634240645273. The reversal of 634240645242 is 242546042436.

634240645242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×634240645242² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 634240645194 and 634240645203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2894434 + ... + 3105837.

It is an arithmetic number, because the mean of its divisors is an integer number (40321827840).

Almost surely, 2^634240645242 is an apocalyptic number.

634240645242 is an abundant number, since it is smaller than the sum of its proper divisors (656057845638).

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

634240645242 is a wasteful number, since it uses less digits than its factorization.

634240645242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000578.

The product of its (nonzero) digits is 1105920, while the sum is 42.

Adding to 634240645242 its reverse (242546042436), we get a palindrome (876786687678).

The spelling of 634240645242 in words is "six hundred thirty-four billion, two hundred forty million, six hundred forty-five thousand, two hundred forty-two".