25398000019 has 6 divisors (see below), whose sum is σ = 29544612324. Its totient is φ = 21769714260.

The previous prime is 25397999999. The next prime is 25398000029. The reversal of 25398000019 is 91000089352.

It is not a de Polignac number, because 25398000019 - 2¹¹ = 25397997971 is a prime.

It is a super-2 number, since 2×25398000019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25398000029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 259163217 + ... + 259163314.

It is an arithmetic number, because the mean of its divisors is an integer number (4924102054).

Almost surely, 2^25398000019 is an apocalyptic number.

25398000019 is a deficient number, since it is larger than the sum of its proper divisors (4146612305).

25398000019 is an equidigital number, since it uses as much as digits as its factorization.

25398000019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518326545 (or 518326538 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 25398000019 in words is "twenty-five billion, three hundred ninety-eight million, nineteen", and thus it is an aban number.