25350420413 has 4 divisors (see below), whose sum is σ = 25351175388. Its totient is φ = 25349665440.

The previous prime is 25350420401. The next prime is 25350420421. The reversal of 25350420413 is 31402405352.

It is a happy number.

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 12359435929 + 12990984484 = 111173^2 + 113978^2 .

It is a cyclic number.

It is not a de Polignac number, because 25350420413 - 2⁴ = 25350420397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25350428413) 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, 324656 + ... + 395097.

It is an arithmetic number, because the mean of its divisors is an integer number (6337793847).

Almost surely, 2^25350420413 is an apocalyptic number.

It is an amenable number.

25350420413 is a deficient number, since it is larger than the sum of its proper divisors (754975).

25350420413 is an equidigital number, since it uses as much as digits as its factorization.

25350420413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754974.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 25350420413 its reverse (31402405352), we get a palindrome (56752825765).

The spelling of 25350420413 in words is "twenty-five billion, three hundred fifty million, four hundred twenty thousand, four hundred thirteen".