635725543 has 4 divisors (see below), whose sum is σ = 663365808. Its totient is φ = 608085280.

The previous prime is 635725529. The next prime is 635725567. The reversal of 635725543 is 345527536.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 635725543 - 2²⁵ = 602171111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 635725496 and 635725505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (635725583) 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 3 ways as a sum of consecutive naturals, for example, 13820098 + ... + 13820143.

It is an arithmetic number, because the mean of its divisors is an integer number (165841452).

Almost surely, 2^635725543 is an apocalyptic number.

635725543 is a deficient number, since it is larger than the sum of its proper divisors (27640265).

635725543 is a wasteful number, since it uses less digits than its factorization.

635725543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27640264.

The product of its digits is 378000, while the sum is 40.

The square root of 635725543 is about 25213.5983746866. The cubic root of 635725543 is about 859.8510391900.

The spelling of 635725543 in words is "six hundred thirty-five million, seven hundred twenty-five thousand, five hundred forty-three".