634506543 has 96 divisors (see below), whose sum is σ = 1099837440. Its totient is φ = 348480000.

The previous prime is 634506527. The next prime is 634506571. The reversal of 634506543 is 345605436.

634506543 is a `hidden beast` number, since 63 + 4 + 50 + 6 + 543 = 666.

It is not a de Polignac number, because 634506543 - 2⁴ = 634506527 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 634506498 and 634506507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634506143) 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 95 ways as a sum of consecutive naturals, for example, 6282193 + ... + 6282293.

It is an arithmetic number, because the mean of its divisors is an integer number (11456640).

Almost surely, 2^634506543 is an apocalyptic number.

634506543 is a deficient number, since it is larger than the sum of its proper divisors (465330897).

634506543 is a wasteful number, since it uses less digits than its factorization.

634506543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The square root of 634506543 is about 25189.4133119452. The cubic root of 634506543 is about 859.3011010976.

The spelling of 634506543 in words is "six hundred thirty-four million, five hundred six thousand, five hundred forty-three".