25205004041405 has 4 divisors (see below), whose sum is σ = 30246004849692. Its totient is φ = 20164003233120.

The previous prime is 25205004041381. The next prime is 25205004041423. The reversal of 25205004041405 is 50414040050252.

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 3029597849476 + 22175406191929 = 1740574^2 + 4709077^2 .

It is not a de Polignac number, because 25205004041405 - 2¹⁶ = 25205003975869 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 3 ways as a sum of consecutive naturals, for example, 2520500404136 + ... + 2520500404145.

It is an arithmetic number, because the mean of its divisors is an integer number (7561501212423).

Almost surely, 2^{25205004041405} is an apocalyptic number.

It is an amenable number.

25205004041405 is a deficient number, since it is larger than the sum of its proper divisors (5041000808287).

25205004041405 is an equidigital number, since it uses as much as digits as its factorization.

25205004041405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5041000808286.

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 25205004041405 its reverse (50414040050252), we get a palindrome (75619044091657).

The spelling of 25205004041405 in words is "twenty-five trillion, two hundred five billion, four million, forty-one thousand, four hundred five".