25021065065 has 8 divisors (see below), whose sum is σ = 30121207368. Its totient is φ = 19952899200.

The previous prime is 25021065053. The next prime is 25021065067. The reversal of 25021065065 is 56056012052.

It can be written as a sum of positive squares in 4 ways, for example, as 2999824 + 25018065241 = 1732^2 + 158171^2 .

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

It is not a de Polignac number, because 25021065065 - 2¹⁶ = 25020999529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25021065067) 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, 7992386 + ... + 7995515.

It is an arithmetic number, because the mean of its divisors is an integer number (3765150921).

Almost surely, 2^25021065065 is an apocalyptic number.

It is an amenable number.

25021065065 is a deficient number, since it is larger than the sum of its proper divisors (5100142303).

25021065065 is a wasteful number, since it uses less digits than its factorization.

25021065065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15988219.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 25021065065 in words is "twenty-five billion, twenty-one million, sixty-five thousand, sixty-five".