2405261605 has 4 divisors (see below), whose sum is σ = 2886313932. Its totient is φ = 1924209280.

The previous prime is 2405261603. The next prime is 2405261611. The reversal of 2405261605 is 5061625042.

2405261605 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.

It can be written as a sum of positive squares in 2 ways, for example, as 1835436964 + 569824641 = 42842^2 + 23871^2 .

It is not a de Polignac number, because 2405261605 - 2¹ = 2405261603 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2405261603) 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, 240526156 + ... + 240526165.

It is an arithmetic number, because the mean of its divisors is an integer number (721578483).

Almost surely, 2^2405261605 is an apocalyptic number.

It is an amenable number.

2405261605 is a deficient number, since it is larger than the sum of its proper divisors (481052327).

2405261605 is an equidigital number, since it uses as much as digits as its factorization.

2405261605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481052326.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2405261605 is about 49043.4664863731. The cubic root of 2405261605 is about 1339.8436004068.

Adding to 2405261605 its reverse (5061625042), we get a palindrome (7466886647).

The spelling of 2405261605 in words is "two billion, four hundred five million, two hundred sixty-one thousand, six hundred five".