12825551808 has 126 divisors (see below), whose sum is σ = 39052318136. Its totient is φ = 4023650304.

The previous prime is 12825551797. The next prime is 12825551831. The reversal of 12825551808 is 80815552821.

12825551808 is a `hidden beast` number, since 1 + 2 + 82 + 55 + 518 + 0 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 127941 + ... + 204987.

Almost surely, 2^12825551808 is an apocalyptic number.

12825551808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12825551808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19526159068).

12825551808 is an abundant number, since it is smaller than the sum of its proper divisors (26226766328).

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

12825551808 is a wasteful number, since it uses less digits than its factorization.

12825551808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77099 (or 77069 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 45.

The spelling of 12825551808 in words is "twelve billion, eight hundred twenty-five million, five hundred fifty-one thousand, eight hundred eight".