25398498005 has 4 divisors (see below), whose sum is σ = 30478197612. Its totient is φ = 20318798400.

The previous prime is 25398497911. The next prime is 25398498017. The reversal of 25398498005 is 50089489352.

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 4995803761 + 20402694244 = 70681^2 + 142838^2 .

It is not a de Polignac number, because 25398498005 - 2¹⁴ = 25398481621 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, 2539849796 + ... + 2539849805.

It is an arithmetic number, because the mean of its divisors is an integer number (7619549403).

Almost surely, 2^25398498005 is an apocalyptic number.

It is an amenable number.

25398498005 is a deficient number, since it is larger than the sum of its proper divisors (5079699607).

25398498005 is an equidigital number, since it uses as much as digits as its factorization.

25398498005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5079699606.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 25398498005 in words is "twenty-five billion, three hundred ninety-eight million, four hundred ninety-eight thousand, five".