25798741019 has 4 divisors (see below), whose sum is σ = 25865062080. Its totient is φ = 25732419960.

The previous prime is 25798741013. The next prime is 25798741099. The reversal of 25798741019 is 91014789752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25798741019 - 2¹² = 25798736923 is a prime.

It is a super-2 number, since 2×25798741019² (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 (25798741013) 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, 33159947 + ... + 33160724.

It is an arithmetic number, because the mean of its divisors is an integer number (6466265520).

Almost surely, 2^25798741019 is an apocalyptic number.

25798741019 is a deficient number, since it is larger than the sum of its proper divisors (66321061).

25798741019 is an equidigital number, since it uses as much as digits as its factorization.

25798741019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66321060.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The spelling of 25798741019 in words is "twenty-five billion, seven hundred ninety-eight million, seven hundred forty-one thousand, nineteen".