25085152805 has 18 divisors (see below), whose sum is σ = 30341635506. Its totient is φ = 19909744128.

The previous prime is 25085152789. The next prime is 25085152871. The reversal of 25085152805 is 50825158052.

It can be written as a sum of positive squares in 3 ways, for example, as 65189476 + 25019963329 = 8074^2 + 158177^2 .

It is not a de Polignac number, because 25085152805 - 2⁴ = 25085152789 is a prime.

It is a Duffinian number.

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 68351732 + ... + 68352098.

It is an arithmetic number, because the mean of its divisors is an integer number (1685646417).

Almost surely, 2^25085152805 is an apocalyptic number.

It is an amenable number.

25085152805 is a deficient number, since it is larger than the sum of its proper divisors (5256482701).

25085152805 is an frugal number, since it uses more digits than its factorization.

25085152805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 41.

The spelling of 25085152805 in words is "twenty-five billion, eighty-five million, one hundred fifty-two thousand, eight hundred five".