25604556250545 has 24 divisors (see below), whose sum is σ = 44381349568296. Its totient is φ = 13655726800128.

The previous prime is 25604556250513. The next prime is 25604556250561. The reversal of 25604556250545 is 54505265540652.

It is a happy number.

25604556250545 is a `hidden beast` number, since 2 + 5 + 6 + 0 + 4 + 5 + 5 + 625 + 0 + 5 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3789594169344 + 21814962081201 = 1946688^2 + 4670649^2 .

It is not a de Polignac number, because 25604556250545 - 2⁵ = 25604556250513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25604556250491 and 25604556250500.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29250549 + ... + 30113181.

It is an arithmetic number, because the mean of its divisors is an integer number (1849222898679).

Almost surely, 2^{25604556250545} is an apocalyptic number.

It is an amenable number.

25604556250545 is a deficient number, since it is larger than the sum of its proper divisors (18776793317751).

25604556250545 is a wasteful number, since it uses less digits than its factorization.

25604556250545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522241 (or 1522238 counting only the distinct ones).

The product of its (nonzero) digits is 36000000, while the sum is 54.

The spelling of 25604556250545 in words is "twenty-five trillion, six hundred four billion, five hundred fifty-six million, two hundred fifty thousand, five hundred forty-five".