25784447651 has 8 divisors (see below), whose sum is σ = 25874660064. Its totient is φ = 25694285760.

The previous prime is 25784447617. The next prime is 25784447671. The reversal of 25784447651 is 15674448752.

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 25784447651 - 2¹⁸ = 25784185507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25784447593 and 25784447602.

It is not an unprimeable number, because it can be changed into a prime (25784447671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215506 + ... + 1236536.

It is an arithmetic number, because the mean of its divisors is an integer number (3234332508).

Almost surely, 2^25784447651 is an apocalyptic number.

25784447651 is a deficient number, since it is larger than the sum of its proper divisors (90212413).

25784447651 is a wasteful number, since it uses less digits than its factorization.

25784447651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25261.

The product of its digits is 7526400, while the sum is 53.

The spelling of 25784447651 in words is "twenty-five billion, seven hundred eighty-four million, four hundred forty-seven thousand, six hundred fifty-one".