635905945 has 16 divisors (see below), whose sum is σ = 788520960. Its totient is φ = 491803200.

The previous prime is 635905943. The next prime is 635905967. The reversal of 635905945 is 549509536.

It is not a de Polignac number, because 635905945 - 2¹ = 635905943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 635905895 and 635905904.

It is not an unprimeable number, because it can be changed into a prime (635905943) 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 15 ways as a sum of consecutive naturals, for example, 226611 + ... + 229399.

It is an arithmetic number, because the mean of its divisors is an integer number (49282560).

Almost surely, 2^635905945 is an apocalyptic number.

It is an amenable number.

635905945 is a deficient number, since it is larger than the sum of its proper divisors (152615015).

635905945 is a wasteful number, since it uses less digits than its factorization.

635905945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4296.

The product of its (nonzero) digits is 729000, while the sum is 46.

The square root of 635905945 is about 25217.1755952168. The cubic root of 635905945 is about 859.9323657826.

The spelling of 635905945 in words is "six hundred thirty-five million, nine hundred five thousand, nine hundred forty-five".