635355656464 has 45 divisors (see below), whose sum is σ = 1243940875279. Its totient is φ = 314373084800.

The previous prime is 635355656461. The next prime is 635355656491. The reversal of 635355656464 is 464656553536.

The square root of 635355656464 is 797092.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 49506250000 + 585849406464 = 222500^2 + 765408^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 635355656399 and 635355656408.

It is not an unprimeable number, because it can be changed into a prime (635355656461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 322024182 + ... + 322026154.

Almost surely, 2^635355656464 is an apocalyptic number.

635355656464 is the 797092-nd square number.

It is an amenable number.

635355656464 is a deficient number, since it is larger than the sum of its proper divisors (608585218815).

635355656464 is an frugal number, since it uses more digits than its factorization.

635355656464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4156 (or 2076 counting only the distinct ones).

The product of its digits is 116640000, while the sum is 58.

The spelling of 635355656464 in words is "six hundred thirty-five billion, three hundred fifty-five million, six hundred fifty-six thousand, four hundred sixty-four".