12806555895 has 64 divisors (see below), whose sum is σ = 26165376000. Its totient is φ = 5821642368.

The previous prime is 12806555887. The next prime is 12806555897. The reversal of 12806555895 is 59855560821.

12806555895 is a `hidden beast` number, since 1 + 2 + 8 + 0 + 6 + 55 + 589 + 5 = 666.

It is not a de Polignac number, because 12806555895 - 2³ = 12806555887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12806555897) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 131301 + ... + 207009.

It is an arithmetic number, because the mean of its divisors is an integer number (408834000).

Almost surely, 2^12806555895 is an apocalyptic number.

12806555895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12806555895 is an abundant number, since it is smaller than the sum of its proper divisors (13358820105).

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

12806555895 is a wasteful number, since it uses less digits than its factorization.

12806555895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75909 (or 75903 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 54.

The spelling of 12806555895 in words is "twelve billion, eight hundred six million, five hundred fifty-five thousand, eight hundred ninety-five".