635028161 has 2 divisors, whose sum is σ = 635028162. Its totient is φ = 635028160.

The previous prime is 635028029. The next prime is 635028179. The reversal of 635028161 is 161820536.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478778161 + 156250000 = 21881^2 + 12500^2 .

It is a cyclic number.

It is not a de Polignac number, because 635028161 - 2¹⁰ = 635027137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (635028181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317514080 + 317514081.

It is an arithmetic number, because the mean of its divisors is an integer number (317514081).

Almost surely, 2^635028161 is an apocalyptic number.

It is an amenable number.

635028161 is a deficient number, since it is larger than the sum of its proper divisors (1).

635028161 is an equidigital number, since it uses as much as digits as its factorization.

635028161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 635028161 is about 25199.7650981115. The cubic root of 635028161 is about 859.5365093089.

Adding to 635028161 its reverse (161820536), we get a palindrome (796848697).

The spelling of 635028161 in words is "six hundred thirty-five million, twenty-eight thousand, one hundred sixty-one".