25604512666533 has 12 divisors (see below), whose sum is σ = 37072144763628. Its totient is φ = 17029129561920.

The previous prime is 25604512666517. The next prime is 25604512666541. The reversal of 25604512666533 is 33566621540652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4142112307524 + 21462400359009 = 2035218^2 + 4632753^2 .

It is not a de Polignac number, because 25604512666533 - 2⁴ = 25604512666517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25604512666533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25604512668533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3378791760 + ... + 3378799337.

It is an arithmetic number, because the mean of its divisors is an integer number (3089345396969).

Almost surely, 2^{25604512666533} is an apocalyptic number.

It is an amenable number.

25604512666533 is a deficient number, since it is larger than the sum of its proper divisors (11467632097095).

25604512666533 is a wasteful number, since it uses less digits than its factorization.

25604512666533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6757591524 (or 6757591521 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 54.

The spelling of 25604512666533 in words is "twenty-five trillion, six hundred four billion, five hundred twelve million, six hundred sixty-six thousand, five hundred thirty-three".