12910861800 has 144 divisors (see below), whose sum is σ = 44367591840. Its totient is φ = 3362808960.

The previous prime is 12910861793. The next prime is 12910861879. The reversal of 12910861800 is 816801921.

12910861800 is a `hidden beast` number, since 1 + 29 + 10 + 8 + 618 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6004 + ... + 160803.

Almost surely, 2^12910861800 is an apocalyptic number.

12910861800 is a gapful number since it is divisible by the number (10) 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 12910861800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22183795920).

12910861800 is an abundant number, since it is smaller than the sum of its proper divisors (31456730040).

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

12910861800 is a wasteful number, since it uses less digits than its factorization.

12910861800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166872 (or 166860 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The spelling of 12910861800 in words is "twelve billion, nine hundred ten million, eight hundred sixty-one thousand, eight hundred".