635948961 has 16 divisors (see below), whose sum is σ = 866327616. Its totient is φ = 414812736.

The previous prime is 635948959. The next prime is 635948983. The reversal of 635948961 is 169849536.

It is not a de Polignac number, because 635948961 - 2¹ = 635948959 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (635948921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53946 + ... + 64668.

It is an arithmetic number, because the mean of its divisors is an integer number (54145476).

Almost surely, 2^635948961 is an apocalyptic number.

It is an amenable number.

635948961 is a deficient number, since it is larger than the sum of its proper divisors (230378655).

635948961 is a wasteful number, since it uses less digits than its factorization.

635948961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11152.

The product of its digits is 1399680, while the sum is 51.

The square root of 635948961 is about 25218.0284915376. The cubic root of 635948961 is about 859.9517554512.

The spelling of 635948961 in words is "six hundred thirty-five million, nine hundred forty-eight thousand, nine hundred sixty-one".