25445481487789 has 8 divisors (see below), whose sum is σ = 27796269612960. Its totient is φ = 23100953785200.

The previous prime is 25445481487759. The next prime is 25445481487879. The reversal of 25445481487789 is 98778418454452.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25445481487789 - 2⁵ = 25445481487757 is a prime.

It is a super-2 number, since 2×25445481487789² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25445481487759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1565097142 + ... + 1565113399.

It is an arithmetic number, because the mean of its divisors is an integer number (3474533701620).

Almost surely, 2^{25445481487789} is an apocalyptic number.

It is an amenable number.

25445481487789 is a deficient number, since it is larger than the sum of its proper divisors (2350788125171).

25445481487789 is a wasteful number, since it uses less digits than its factorization.

25445481487789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130211291.

The product of its digits is 2890137600, while the sum is 76.

The spelling of 25445481487789 in words is "twenty-five trillion, four hundred forty-five billion, four hundred eighty-one million, four hundred eighty-seven thousand, seven hundred eighty-nine".