25861010860 has 24 divisors (see below), whose sum is σ = 54316891440. Its totient is φ = 10342734144.

The previous prime is 25861010849. The next prime is 25861010863. The reversal of 25861010860 is 6801016852.

It is not an unprimeable number, because it can be changed into a prime (25861010863) 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 7 ways as a sum of consecutive naturals, for example, 26587 + ... + 228973.

It is an arithmetic number, because the mean of its divisors is an integer number (2263203810).

Almost surely, 2^25861010860 is an apocalyptic number.

25861010860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25861010860 is an abundant number, since it is smaller than the sum of its proper divisors (28455880580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25861010860 is a wasteful number, since it uses less digits than its factorization.

25861010860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208785 (or 208783 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 25861010860 in words is "twenty-five billion, eight hundred sixty-one million, ten thousand, eight hundred sixty".