25665850457 has 8 divisors (see below), whose sum is σ = 27990023040. Its totient is φ = 23391660240.

The previous prime is 25665850439. The next prime is 25665850459. The reversal of 25665850457 is 75405856652.

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

It is not a de Polignac number, because 25665850457 - 2⁶ = 25665850393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25665850399 and 25665850408.

It is not an unprimeable number, because it can be changed into a prime (25665850459) 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, 12494519 + ... + 12496572.

It is an arithmetic number, because the mean of its divisors is an integer number (3498752880).

Almost surely, 2^25665850457 is an apocalyptic number.

It is an amenable number.

25665850457 is a deficient number, since it is larger than the sum of its proper divisors (2324172583).

25665850457 is a wasteful number, since it uses less digits than its factorization.

25665850457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24991183.

The product of its (nonzero) digits is 10080000, while the sum is 53.

The spelling of 25665850457 in words is "twenty-five billion, six hundred sixty-five million, eight hundred fifty thousand, four hundred fifty-seven".