25788750019 has 4 divisors (see below), whose sum is σ = 25806798160. Its totient is φ = 25770701880.

The previous prime is 25788749999. The next prime is 25788750089. The reversal of 25788750019 is 91005788752.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25788750019 is a prime.

It is a super-2 number, since 2×25788750019² (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 (25788750089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9021927 + ... + 9024784.

It is an arithmetic number, because the mean of its divisors is an integer number (6451699540).

Almost surely, 2^25788750019 is an apocalyptic number.

25788750019 is a deficient number, since it is larger than the sum of its proper divisors (18048141).

25788750019 is a wasteful number, since it uses less digits than its factorization.

25788750019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18048140.

The product of its (nonzero) digits is 1411200, while the sum is 52.

The spelling of 25788750019 in words is "twenty-five billion, seven hundred eighty-eight million, seven hundred fifty thousand, nineteen".