2605816601 has 4 divisors (see below), whose sum is σ = 2606012112. Its totient is φ = 2605621092.

The previous prime is 2605816589. The next prime is 2605816613. The reversal of 2605816601 is 1066185062.

It is a happy number.

2605816601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (2605816589) and next prime (2605816613).

It is a cyclic number.

It is not a de Polignac number, because 2605816601 - 2⁶ = 2605816537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2605816691) 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, 76175 + ... + 104948.

It is an arithmetic number, because the mean of its divisors is an integer number (651503028).

Almost surely, 2^2605816601 is an apocalyptic number.

It is an amenable number.

2605816601 is a deficient number, since it is larger than the sum of its proper divisors (195511).

2605816601 is a wasteful number, since it uses less digits than its factorization.

2605816601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195510.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 2605816601 is about 51047.1997371061. The cubic root of 2605816601 is about 1376.0935170648.

The spelling of 2605816601 in words is "two billion, six hundred five million, eight hundred sixteen thousand, six hundred one".