2505161605 has 8 divisors (see below), whose sum is σ = 3007455264. Its totient is φ = 2003288400.

The previous prime is 2505161567. The next prime is 2505161611. The reversal of 2505161605 is 5061615052.

2505161605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2505161605 - 2⁹ = 2505161093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91851 + ... + 115960.

It is an arithmetic number, because the mean of its divisors is an integer number (375931908).

Almost surely, 2^2505161605 is an apocalyptic number.

It is an amenable number.

2505161605 is a deficient number, since it is larger than the sum of its proper divisors (502293659).

2505161605 is a wasteful number, since it uses less digits than its factorization.

2505161605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210227.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 2505161605 is about 50051.5894353017. The cubic root of 2505161605 is about 1358.1422163102.

Adding to 2505161605 its reverse (5061615052), we get a palindrome (7566776657).

The spelling of 2505161605 in words is "two billion, five hundred five million, one hundred sixty-one thousand, six hundred five".