634400543260413 has 12 divisors (see below), whose sum is σ = 917772656100768. Its totient is φ = 422280011275080.

The previous prime is 634400543260381. The next prime is 634400543260417. The reversal of 634400543260413 is 314062345004436.

It is a happy number.

634400543260413 is a `hidden beast` number, since 6 + 3 + 4 + 4 + 0 + 0 + 5 + 4 + 32 + 604 + 1 + 3 = 666.

It is not a de Polignac number, because 634400543260413 - 2⁵ = 634400543260381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634400543260417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54473679843 + ... + 54473691488.

It is an arithmetic number, because the mean of its divisors is an integer number (76481054675064).

Almost surely, 2^{634400543260413} is an apocalyptic number.

It is an amenable number.

634400543260413 is a deficient number, since it is larger than the sum of its proper divisors (283372112840355).

634400543260413 is a wasteful number, since it uses less digits than its factorization.

634400543260413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108947371984 (or 108947371981 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 45.

Adding to 634400543260413 its reverse (314062345004436), we get a palindrome (948462888264849).

The spelling of 634400543260413 in words is "six hundred thirty-four trillion, four hundred billion, five hundred forty-three million, two hundred sixty thousand, four hundred thirteen".