12656949100 has 18 divisors (see below), whose sum is σ = 27465579764. Its totient is φ = 5062779600.

The previous prime is 12656949061. The next prime is 12656949113. The reversal of 12656949100 is 194965621.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63284646 + ... + 63284845.

Almost surely, 2^12656949100 is an apocalyptic number.

12656949100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12656949100 is an abundant number, since it is smaller than the sum of its proper divisors (14808630664).

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

12656949100 is a wasteful number, since it uses less digits than its factorization.

12656949100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126569505 (or 126569498 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 12656949100 in words is "twelve billion, six hundred fifty-six million, nine hundred forty-nine thousand, one hundred".