2504636161 has 4 divisors (see below), whose sum is σ = 2504882772. Its totient is φ = 2504389552.

The previous prime is 2504636159. The next prime is 2504636171. The reversal of 2504636161 is 1616364052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1221921936 + 1282714225 = 34956^2 + 35815^2 .

It is a cyclic number.

It is not a de Polignac number, because 2504636161 - 2¹ = 2504636159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2504636171) 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, 107386 + ... + 128611.

It is an arithmetic number, because the mean of its divisors is an integer number (626220693).

Almost surely, 2^2504636161 is an apocalyptic number.

It is an amenable number.

2504636161 is a deficient number, since it is larger than the sum of its proper divisors (246611).

2504636161 is a wasteful number, since it uses less digits than its factorization.

2504636161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246610.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 2504636161 is about 50046.3401359180. The cubic root of 2504636161 is about 1358.0472553602.

The spelling of 2504636161 in words is "two billion, five hundred four million, six hundred thirty-six thousand, one hundred sixty-one".