635896401 has 32 divisors (see below), whose sum is σ = 986861568. Its totient is φ = 356728320.

The previous prime is 635896361. The next prime is 635896403. The reversal of 635896401 is 104698536.

It is a de Polignac number, because none of the positive numbers 2^k-635896401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (635896403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265656 + ... + 268038.

It is an arithmetic number, because the mean of its divisors is an integer number (30839424).

Almost surely, 2^635896401 is an apocalyptic number.

It is an amenable number.

635896401 is a deficient number, since it is larger than the sum of its proper divisors (350965167).

635896401 is a wasteful number, since it uses less digits than its factorization.

635896401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 635896401 is about 25216.9863584053. The cubic root of 635896401 is about 859.9280636602.

The spelling of 635896401 in words is "six hundred thirty-five million, eight hundred ninety-six thousand, four hundred one".