12643877700 has 108 divisors (see below), whose sum is σ = 39677252160. Its totient is φ = 3367811520.

The previous prime is 12643877677. The next prime is 12643877717. The reversal of 12643877700 is 777834621.

12643877700 is a `hidden beast` number, since 1 + 264 + 387 + 7 + 7 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 819457 + ... + 834743.

Almost surely, 2^12643877700 is an apocalyptic number.

12643877700 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 12643877700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19838626080).

12643877700 is an abundant number, since it is smaller than the sum of its proper divisors (27033374460).

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

12643877700 is a wasteful number, since it uses less digits than its factorization.

12643877700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16226 (or 16216 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The spelling of 12643877700 in words is "twelve billion, six hundred forty-three million, eight hundred seventy-seven thousand, seven hundred".