636161241 has 4 divisors (see below), whose sum is σ = 848214992. Its totient is φ = 424107492.

The previous prime is 636161203. The next prime is 636161263. The reversal of 636161241 is 142161636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 636161241 - 2⁶ = 636161177 is a prime.

It is a super-2 number, since 2×636161241² = 809402249101320162, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 636161199 and 636161208.

It is not an unprimeable number, because it can be changed into a prime (636161291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106026871 + ... + 106026876.

It is an arithmetic number, because the mean of its divisors is an integer number (212053748).

Almost surely, 2^636161241 is an apocalyptic number.

It is an amenable number.

636161241 is a deficient number, since it is larger than the sum of its proper divisors (212053751).

636161241 is a wasteful number, since it uses less digits than its factorization.

636161241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212053750.

The product of its digits is 5184, while the sum is 30.

The square root of 636161241 is about 25222.2370340143. The cubic root of 636161241 is about 860.0474288788.

The spelling of 636161241 in words is "six hundred thirty-six million, one hundred sixty-one thousand, two hundred forty-one".