25568999985 has 16 divisors (see below), whose sum is σ = 40929940800. Its totient is φ = 13630286400.

The previous prime is 25568999983. The next prime is 25569000071. The reversal of 25568999985 is 58999986552.

It is not a de Polignac number, because 25568999985 - 2¹ = 25568999983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25568999983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374566 + ... + 437535.

It is an arithmetic number, because the mean of its divisors is an integer number (2558121300).

Almost surely, 2^25568999985 is an apocalyptic number.

It is an amenable number.

25568999985 is a deficient number, since it is larger than the sum of its proper divisors (15360940815).

25568999985 is a wasteful number, since it uses less digits than its factorization.

25568999985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814208.

The product of its digits is 629856000, while the sum is 75.

The spelling of 25568999985 in words is "twenty-five billion, five hundred sixty-eight million, nine hundred ninety-nine thousand, nine hundred eighty-five".