25502580805825 has 24 divisors (see below), whose sum is σ = 31637480696640. Its totient is φ = 20392853083200.

The previous prime is 25502580805811. The next prime is 25502580805837. The reversal of 25502580805825 is 52850808520552.

It is a happy number.

It is not a de Polignac number, because 25502580805825 - 2⁷ = 25502580805697 is a prime.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1044875772 + ... + 1044900178.

It is an arithmetic number, because the mean of its divisors is an integer number (1318228362360).

Almost surely, 2^{25502580805825} is an apocalyptic number.

25502580805825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25502580805825 is a deficient number, since it is larger than the sum of its proper divisors (6134899890815).

25502580805825 is a wasteful number, since it uses less digits than its factorization.

25502580805825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41577 (or 41572 counting only the distinct ones).

The product of its (nonzero) digits is 12800000, while the sum is 55.

The spelling of 25502580805825 in words is "twenty-five trillion, five hundred two billion, five hundred eighty million, eight hundred five thousand, eight hundred twenty-five".