2606805457 has 4 divisors (see below), whose sum is σ = 2609330020. Its totient is φ = 2604280896.

The previous prime is 2606805433. The next prime is 2606805463. The reversal of 2606805457 is 7545086062.

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 2155837761 + 450967696 = 46431^2 + 21236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2606805457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2606805427) 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, 1260732 + ... + 1262797.

It is an arithmetic number, because the mean of its divisors is an integer number (652332505).

Almost surely, 2^2606805457 is an apocalyptic number.

It is an amenable number.

2606805457 is a deficient number, since it is larger than the sum of its proper divisors (2524563).

2606805457 is a wasteful number, since it uses less digits than its factorization.

2606805457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524562.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 2606805457 is about 51056.8845210908. The cubic root of 2606805457 is about 1376.2675618331.

The spelling of 2606805457 in words is "two billion, six hundred six million, eight hundred five thousand, four hundred fifty-seven".